From 3fd6805f4dfb02bcfb5634972eabad0e790f119a Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Wed, 8 Feb 2006 21:16:45 +0100 Subject: [PATCH] Clean up module.c symbol searching logic Signed-off-by: Sam Ravnborg Signed-off-by: Greg Kroah-Hartman --- kernel/module.c | 73 ++++++++++++++++++++++++++++++++------------------------- 1 file changed, 41 insertions(+), 32 deletions(-) (limited to 'kernel/module.c') diff --git a/kernel/module.c b/kernel/module.c index 5aad477ddc7..2a892b20d68 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -135,6 +135,18 @@ extern const unsigned long __start___kcrctab_gpl[]; #define symversion(base, idx) ((base) ? ((base) + (idx)) : NULL) #endif +/* lookup symbol in given range of kernel_symbols */ +static const struct kernel_symbol *lookup_symbol(const char *name, + const struct kernel_symbol *start, + const struct kernel_symbol *stop) +{ + const struct kernel_symbol *ks = start; + for (; ks < stop; ks++) + if (strcmp(ks->name, name) == 0) + return ks; + return NULL; +} + /* Find a symbol, return value, crc and module which owns it */ static unsigned long __find_symbol(const char *name, struct module **owner, @@ -142,39 +154,41 @@ static unsigned long __find_symbol(const char *name, int gplok) { struct module *mod; - unsigned int i; + const struct kernel_symbol *ks; /* Core kernel first. */ *owner = NULL; - for (i = 0; __start___ksymtab+i < __stop___ksymtab; i++) { - if (strcmp(__start___ksymtab[i].name, name) == 0) { - *crc = symversion(__start___kcrctab, i); - return __start___ksymtab[i].value; - } + ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); + if (ks) { + *crc = symversion(__start___kcrctab, (ks - __start___ksymtab)); + return ks->value; } if (gplok) { - for (i = 0; __start___ksymtab_gpl+i<__stop___ksymtab_gpl; i++) - if (strcmp(__start___ksymtab_gpl[i].name, name) == 0) { - *crc = symversion(__start___kcrctab_gpl, i); - return __start___ksymtab_gpl[i].value; - } + ks = lookup_symbol(name, __start___ksymtab_gpl, + __stop___ksymtab_gpl); + if (ks) { + *crc = symversion(__start___kcrctab_gpl, + (ks - __start___ksymtab_gpl)); + return ks->value; + } } /* Now try modules. */ list_for_each_entry(mod, &modules, list) { *owner = mod; - for (i = 0; i < mod->num_syms; i++) - if (strcmp(mod->syms[i].name, name) == 0) { - *crc = symversion(mod->crcs, i); - return mod->syms[i].value; - } + ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); + if (ks) { + *crc = symversion(mod->crcs, (ks - mod->syms)); + return ks->value; + } if (gplok) { - for (i = 0; i < mod->num_gpl_syms; i++) { - if (strcmp(mod->gpl_syms[i].name, name) == 0) { - *crc = symversion(mod->gpl_crcs, i); - return mod->gpl_syms[i].value; - } + ks = lookup_symbol(name, mod->gpl_syms, + mod->gpl_syms + mod->num_gpl_syms); + if (ks) { + *crc = symversion(mod->gpl_crcs, + (ks - mod->gpl_syms)); + return ks->value; } } } @@ -1444,18 +1458,13 @@ static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs, #ifdef CONFIG_KALLSYMS int is_exported(const char *name, const struct module *mod) { - unsigned int i; - - if (!mod) { - for (i = 0; __start___ksymtab+i < __stop___ksymtab; i++) - if (strcmp(__start___ksymtab[i].name, name) == 0) - return 1; - return 0; - } - for (i = 0; i < mod->num_syms; i++) - if (strcmp(mod->syms[i].name, name) == 0) + if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab)) + return 1; + else + if (lookup_symbol(name, mod->syms, mod->syms + mod->num_syms)) return 1; - return 0; + else + return 0; } /* As per nm */ -- cgit v1.2.3-70-g09d2 From 9f28bb7e1d0188a993403ab39b774785892805e1 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Mon, 20 Mar 2006 13:17:13 -0800 Subject: [PATCH] add EXPORT_SYMBOL_GPL_FUTURE() This patch adds the ability to mark symbols that will be changed in the future, so that kernel modules that don't include MODULE_LICENSE("GPL") and use the symbols, will be flagged and printed out to the system log. Signed-off-by: Greg Kroah-Hartman --- arch/m68knommu/kernel/vmlinux.lds.S | 10 ++++ arch/v850/kernel/vmlinux.lds.S | 8 ++++ include/asm-generic/vmlinux.lds.h | 14 ++++++ include/linux/module.h | 9 ++++ kernel/module.c | 49 +++++++++++++++++++- scripts/genksyms/keywords.c_shipped | 91 +++++++++++++++++++------------------ scripts/genksyms/keywords.gperf | 1 + 7 files changed, 135 insertions(+), 47 deletions(-) (limited to 'kernel/module.c') diff --git a/arch/m68knommu/kernel/vmlinux.lds.S b/arch/m68knommu/kernel/vmlinux.lds.S index ac9de2661c0..a331cc90797 100644 --- a/arch/m68knommu/kernel/vmlinux.lds.S +++ b/arch/m68knommu/kernel/vmlinux.lds.S @@ -269,6 +269,11 @@ SECTIONS { *(__ksymtab_gpl) __stop___ksymtab_gpl = .; + /* Kernel symbol table: GPL-future symbols */ + __start___ksymtab_gpl_future = .; + *(__ksymtab_gpl_future) + __stop___ksymtab_gpl_future = .; + /* Kernel symbol table: Normal symbols */ __start___kcrctab = .; *(__kcrctab) @@ -279,6 +284,11 @@ SECTIONS { *(__kcrctab_gpl) __stop___kcrctab_gpl = .; + /* Kernel symbol table: GPL-future symbols */ + __start___kcrctab_gpl_future = .; + *(__kcrctab_gpl_future) + __stop___kcrctab_gpl_future = .; + /* Kernel symbol table: strings */ *(__ksymtab_strings) diff --git a/arch/v850/kernel/vmlinux.lds.S b/arch/v850/kernel/vmlinux.lds.S index 5be05f47109..5b2ffcc6e2b 100644 --- a/arch/v850/kernel/vmlinux.lds.S +++ b/arch/v850/kernel/vmlinux.lds.S @@ -64,6 +64,10 @@ ___start___ksymtab_gpl = .; \ *(__ksymtab_gpl) \ ___stop___ksymtab_gpl = .; \ + /* Kernel symbol table: GPL-future symbols */ \ + ___start___ksymtab_gpl_future = .; \ + *(__ksymtab_gpl_future) \ + ___stop___ksymtab_gpl_future = .; \ /* Kernel symbol table: strings */ \ *(__ksymtab_strings) \ /* Kernel symbol table: Normal symbols */ \ @@ -74,6 +78,10 @@ ___start___kcrctab_gpl = .; \ *(__kcrctab_gpl) \ ___stop___kcrctab_gpl = .; \ + /* Kernel symbol table: GPL-future symbols */ \ + ___start___kcrctab_gpl_future = .; \ + *(__kcrctab_gpl_future) \ + ___stop___kcrctab_gpl_future = .; \ /* Built-in module parameters */ \ . = ALIGN (4) ; \ ___start___param = .; \ diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 35de20cf8fa..9d11550b481 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -58,6 +58,13 @@ VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \ } \ \ + /* Kernel symbol table: GPL-future-only symbols */ \ + __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \ + VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \ + *(__ksymtab_gpl_future) \ + VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \ + } \ + \ /* Kernel symbol table: Normal symbols */ \ __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__start___kcrctab) = .; \ @@ -72,6 +79,13 @@ VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \ } \ \ + /* Kernel symbol table: GPL-future-only symbols */ \ + __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \ + VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \ + *(__kcrctab_gpl_future) \ + VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \ + } \ + \ /* Kernel symbol table: strings */ \ __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \ *(__ksymtab_strings) \ diff --git a/include/linux/module.h b/include/linux/module.h index 84d75f3a8ac..a25d5f61548 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -198,6 +198,9 @@ void *__symbol_get_gpl(const char *symbol); #define EXPORT_SYMBOL_GPL(sym) \ __EXPORT_SYMBOL(sym, "_gpl") +#define EXPORT_SYMBOL_GPL_FUTURE(sym) \ + __EXPORT_SYMBOL(sym, "_gpl_future") + #endif struct module_ref @@ -255,6 +258,11 @@ struct module unsigned int num_gpl_syms; const unsigned long *gpl_crcs; + /* symbols that will be GPL-only in the near future. */ + const struct kernel_symbol *gpl_future_syms; + unsigned int num_gpl_future_syms; + const unsigned long *gpl_future_crcs; + /* Exception table */ unsigned int num_exentries; const struct exception_table_entry *extable; @@ -441,6 +449,7 @@ void module_remove_driver(struct device_driver *); #else /* !CONFIG_MODULES... */ #define EXPORT_SYMBOL(sym) #define EXPORT_SYMBOL_GPL(sym) +#define EXPORT_SYMBOL_GPL_FUTURE(sym) /* Given an address, look for it in the exception tables. */ static inline const struct exception_table_entry * diff --git a/kernel/module.c b/kernel/module.c index 2a892b20d68..5ca99fbe9f4 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -126,8 +126,11 @@ extern const struct kernel_symbol __start___ksymtab[]; extern const struct kernel_symbol __stop___ksymtab[]; extern const struct kernel_symbol __start___ksymtab_gpl[]; extern const struct kernel_symbol __stop___ksymtab_gpl[]; +extern const struct kernel_symbol __start___ksymtab_gpl_future[]; +extern const struct kernel_symbol __stop___ksymtab_gpl_future[]; extern const unsigned long __start___kcrctab[]; extern const unsigned long __start___kcrctab_gpl[]; +extern const unsigned long __start___kcrctab_gpl_future[]; #ifndef CONFIG_MODVERSIONS #define symversion(base, idx) NULL @@ -172,6 +175,22 @@ static unsigned long __find_symbol(const char *name, return ks->value; } } + ks = lookup_symbol(name, __start___ksymtab_gpl_future, + __stop___ksymtab_gpl_future); + if (ks) { + if (!gplok) { + printk(KERN_WARNING "Symbol %s is being used " + "by a non-GPL module, which will not " + "be allowed in the future\n", name); + printk(KERN_WARNING "Please see the file " + "Documentation/feature-removal-schedule.txt " + "in the kernel source tree for more " + "details.\n"); + } + *crc = symversion(__start___kcrctab_gpl_future, + (ks - __start___ksymtab_gpl_future)); + return ks->value; + } /* Now try modules. */ list_for_each_entry(mod, &modules, list) { @@ -191,6 +210,23 @@ static unsigned long __find_symbol(const char *name, return ks->value; } } + ks = lookup_symbol(name, mod->gpl_future_syms, + (mod->gpl_future_syms + + mod->num_gpl_future_syms)); + if (ks) { + if (!gplok) { + printk(KERN_WARNING "Symbol %s is being used " + "by a non-GPL module, which will not " + "be allowed in the future\n", name); + printk(KERN_WARNING "Please see the file " + "Documentation/feature-removal-schedule.txt " + "in the kernel source tree for more " + "details.\n"); + } + *crc = symversion(mod->gpl_future_crcs, + (ks - mod->gpl_future_syms)); + return ks->value; + } } DEBUGP("Failed to find symbol %s\n", name); return 0; @@ -1546,7 +1582,8 @@ static struct module *load_module(void __user *umod, char *secstrings, *args, *modmagic, *strtab = NULL; unsigned int i, symindex = 0, strindex = 0, setupindex, exindex, exportindex, modindex, obsparmindex, infoindex, gplindex, - crcindex, gplcrcindex, versindex, pcpuindex; + crcindex, gplcrcindex, versindex, pcpuindex, gplfutureindex, + gplfuturecrcindex; long arglen; struct module *mod; long err = 0; @@ -1627,8 +1664,10 @@ static struct module *load_module(void __user *umod, /* Optional sections */ exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab"); gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl"); + gplfutureindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl_future"); crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab"); gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl"); + gplfuturecrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl_future"); setupindex = find_sec(hdr, sechdrs, secstrings, "__param"); exindex = find_sec(hdr, sechdrs, secstrings, "__ex_table"); obsparmindex = find_sec(hdr, sechdrs, secstrings, "__obsparm"); @@ -1784,10 +1823,16 @@ static struct module *load_module(void __user *umod, mod->gpl_syms = (void *)sechdrs[gplindex].sh_addr; if (gplcrcindex) mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr; + mod->num_gpl_future_syms = sechdrs[gplfutureindex].sh_size / + sizeof(*mod->gpl_future_syms); + mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr; + if (gplfuturecrcindex) + mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr; #ifdef CONFIG_MODVERSIONS if ((mod->num_syms && !crcindex) || - (mod->num_gpl_syms && !gplcrcindex)) { + (mod->num_gpl_syms && !gplcrcindex) || + (mod->num_gpl_future_syms && !gplfuturecrcindex)) { printk(KERN_WARNING "%s: No versions for exported symbols." " Tainting kernel.\n", mod->name); add_taint(TAINT_FORCED_MODULE); diff --git a/scripts/genksyms/keywords.c_shipped b/scripts/genksyms/keywords.c_shipped index ee4647805c5..d8153f572e4 100644 --- a/scripts/genksyms/keywords.c_shipped +++ b/scripts/genksyms/keywords.c_shipped @@ -52,9 +52,9 @@ is_reserved_hash (register const char *str, register unsigned int len) 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, - 71, 71, 71, 71, 71, 71, 71, 71, 71, 15, - 71, 71, 71, 71, 71, 71, 15, 71, 71, 71, - 10, 71, 71, 71, 71, 71, 71, 71, 71, 71, + 71, 71, 71, 71, 71, 71, 71, 71, 71, 0, + 71, 71, 71, 71, 71, 71, 35, 71, 71, 71, + 5, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 71, 0, 71, 0, 71, 5, 5, 0, 10, 20, 71, 25, 71, 71, 20, 0, 20, 30, 25, 71, 10, 5, 0, 20, 15, 71, @@ -84,9 +84,9 @@ is_reserved_word (register const char *str, register unsigned int len) { enum { - TOTAL_KEYWORDS = 41, + TOTAL_KEYWORDS = 42, MIN_WORD_LENGTH = 3, - MAX_WORD_LENGTH = 17, + MAX_WORD_LENGTH = 24, MIN_HASH_VALUE = 3, MAX_HASH_VALUE = 70 }; @@ -94,104 +94,105 @@ is_reserved_word (register const char *str, register unsigned int len) static const struct resword wordlist[] = { {""}, {""}, {""}, -#line 24 "scripts/genksyms/keywords.gperf" +#line 25 "scripts/genksyms/keywords.gperf" {"asm", ASM_KEYW}, {""}, -#line 7 "scripts/genksyms/keywords.gperf" +#line 8 "scripts/genksyms/keywords.gperf" {"__asm", ASM_KEYW}, {""}, -#line 8 "scripts/genksyms/keywords.gperf" +#line 9 "scripts/genksyms/keywords.gperf" {"__asm__", ASM_KEYW}, {""}, -#line 21 "scripts/genksyms/keywords.gperf" +#line 22 "scripts/genksyms/keywords.gperf" {"_restrict", RESTRICT_KEYW}, -#line 50 "scripts/genksyms/keywords.gperf" +#line 51 "scripts/genksyms/keywords.gperf" {"__typeof__", TYPEOF_KEYW}, -#line 9 "scripts/genksyms/keywords.gperf" +#line 10 "scripts/genksyms/keywords.gperf" {"__attribute", ATTRIBUTE_KEYW}, -#line 11 "scripts/genksyms/keywords.gperf" +#line 12 "scripts/genksyms/keywords.gperf" {"__const", CONST_KEYW}, -#line 10 "scripts/genksyms/keywords.gperf" +#line 11 "scripts/genksyms/keywords.gperf" {"__attribute__", ATTRIBUTE_KEYW}, -#line 12 "scripts/genksyms/keywords.gperf" +#line 13 "scripts/genksyms/keywords.gperf" {"__const__", CONST_KEYW}, -#line 16 "scripts/genksyms/keywords.gperf" +#line 17 "scripts/genksyms/keywords.gperf" {"__signed__", SIGNED_KEYW}, -#line 42 "scripts/genksyms/keywords.gperf" +#line 43 "scripts/genksyms/keywords.gperf" {"static", STATIC_KEYW}, {""}, -#line 15 "scripts/genksyms/keywords.gperf" +#line 16 "scripts/genksyms/keywords.gperf" {"__signed", SIGNED_KEYW}, -#line 30 "scripts/genksyms/keywords.gperf" +#line 31 "scripts/genksyms/keywords.gperf" {"char", CHAR_KEYW}, {""}, -#line 43 "scripts/genksyms/keywords.gperf" +#line 44 "scripts/genksyms/keywords.gperf" {"struct", STRUCT_KEYW}, -#line 22 "scripts/genksyms/keywords.gperf" - {"__restrict__", RESTRICT_KEYW}, #line 23 "scripts/genksyms/keywords.gperf" + {"__restrict__", RESTRICT_KEYW}, +#line 24 "scripts/genksyms/keywords.gperf" {"restrict", RESTRICT_KEYW}, -#line 33 "scripts/genksyms/keywords.gperf" +#line 34 "scripts/genksyms/keywords.gperf" {"enum", ENUM_KEYW}, -#line 17 "scripts/genksyms/keywords.gperf" +#line 18 "scripts/genksyms/keywords.gperf" {"__volatile", VOLATILE_KEYW}, -#line 34 "scripts/genksyms/keywords.gperf" +#line 35 "scripts/genksyms/keywords.gperf" {"extern", EXTERN_KEYW}, -#line 18 "scripts/genksyms/keywords.gperf" +#line 19 "scripts/genksyms/keywords.gperf" {"__volatile__", VOLATILE_KEYW}, -#line 37 "scripts/genksyms/keywords.gperf" +#line 38 "scripts/genksyms/keywords.gperf" {"int", INT_KEYW}, - {""}, -#line 31 "scripts/genksyms/keywords.gperf" - {"const", CONST_KEYW}, +#line 7 "scripts/genksyms/keywords.gperf" + {"EXPORT_SYMBOL_GPL_FUTURE", EXPORT_SYMBOL_KEYW}, #line 32 "scripts/genksyms/keywords.gperf" + {"const", CONST_KEYW}, +#line 33 "scripts/genksyms/keywords.gperf" {"double", DOUBLE_KEYW}, {""}, -#line 13 "scripts/genksyms/keywords.gperf" +#line 14 "scripts/genksyms/keywords.gperf" {"__inline", INLINE_KEYW}, -#line 29 "scripts/genksyms/keywords.gperf" +#line 30 "scripts/genksyms/keywords.gperf" {"auto", AUTO_KEYW}, -#line 14 "scripts/genksyms/keywords.gperf" +#line 15 "scripts/genksyms/keywords.gperf" {"__inline__", INLINE_KEYW}, -#line 41 "scripts/genksyms/keywords.gperf" +#line 42 "scripts/genksyms/keywords.gperf" {"signed", SIGNED_KEYW}, {""}, -#line 46 "scripts/genksyms/keywords.gperf" +#line 47 "scripts/genksyms/keywords.gperf" {"unsigned", UNSIGNED_KEYW}, {""}, -#line 40 "scripts/genksyms/keywords.gperf" +#line 41 "scripts/genksyms/keywords.gperf" {"short", SHORT_KEYW}, -#line 49 "scripts/genksyms/keywords.gperf" +#line 50 "scripts/genksyms/keywords.gperf" {"typeof", TYPEOF_KEYW}, -#line 44 "scripts/genksyms/keywords.gperf" +#line 45 "scripts/genksyms/keywords.gperf" {"typedef", TYPEDEF_KEYW}, -#line 48 "scripts/genksyms/keywords.gperf" +#line 49 "scripts/genksyms/keywords.gperf" {"volatile", VOLATILE_KEYW}, {""}, -#line 35 "scripts/genksyms/keywords.gperf" +#line 36 "scripts/genksyms/keywords.gperf" {"float", FLOAT_KEYW}, {""}, {""}, -#line 39 "scripts/genksyms/keywords.gperf" +#line 40 "scripts/genksyms/keywords.gperf" {"register", REGISTER_KEYW}, -#line 47 "scripts/genksyms/keywords.gperf" +#line 48 "scripts/genksyms/keywords.gperf" {"void", VOID_KEYW}, {""}, -#line 36 "scripts/genksyms/keywords.gperf" +#line 37 "scripts/genksyms/keywords.gperf" {"inline", INLINE_KEYW}, {""}, #line 5 "scripts/genksyms/keywords.gperf" {"EXPORT_SYMBOL", EXPORT_SYMBOL_KEYW}, {""}, -#line 20 "scripts/genksyms/keywords.gperf" +#line 21 "scripts/genksyms/keywords.gperf" {"_Bool", BOOL_KEYW}, {""}, #line 6 "scripts/genksyms/keywords.gperf" {"EXPORT_SYMBOL_GPL", EXPORT_SYMBOL_KEYW}, {""}, {""}, {""}, {""}, {""}, {""}, -#line 38 "scripts/genksyms/keywords.gperf" +#line 39 "scripts/genksyms/keywords.gperf" {"long", LONG_KEYW}, {""}, {""}, {""}, {""}, {""}, -#line 45 "scripts/genksyms/keywords.gperf" +#line 46 "scripts/genksyms/keywords.gperf" {"union", UNION_KEYW} }; diff --git a/scripts/genksyms/keywords.gperf b/scripts/genksyms/keywords.gperf index b6bec765996..c75e0c8d8f0 100644 --- a/scripts/genksyms/keywords.gperf +++ b/scripts/genksyms/keywords.gperf @@ -4,6 +4,7 @@ struct resword { const char *name; int token; } %% EXPORT_SYMBOL, EXPORT_SYMBOL_KEYW EXPORT_SYMBOL_GPL, EXPORT_SYMBOL_KEYW +EXPORT_SYMBOL_GPL_FUTURE, EXPORT_SYMBOL_KEYW __asm, ASM_KEYW __asm__, ASM_KEYW __attribute, ATTRIBUTE_KEYW -- cgit v1.2.3-70-g09d2 From 03e88ae1b13dfdc8bbaa59b8198e1ca53aad12ac Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 16 Feb 2006 13:50:23 -0800 Subject: [PATCH] fix module sysfs files reference counting The module files, refcnt, version, and srcversion did not properly increment the owner's module reference count, allowing the modules to be removed while the files were open, causing oopses. This patch fixes this, and also fixes the problem that the version and srcversion files were not showing up, unless CONFIG_MODULE_UNLOAD was enabled, which is not correct. Cc: Nathan Lynch Signed-off-by: Greg Kroah-Hartman --- include/linux/module.h | 1 + kernel/module.c | 77 ++++++++++++++++++++------------------------------ kernel/params.c | 10 ------- 3 files changed, 32 insertions(+), 56 deletions(-) (limited to 'kernel/module.c') diff --git a/include/linux/module.h b/include/linux/module.h index a25d5f61548..70bd843c71c 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -245,6 +245,7 @@ struct module /* Sysfs stuff. */ struct module_kobject mkobj; struct module_param_attrs *param_attrs; + struct module_attribute *modinfo_attrs; const char *version; const char *srcversion; diff --git a/kernel/module.c b/kernel/module.c index 5ca99fbe9f4..77764f22f02 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -429,7 +429,6 @@ static inline void percpu_modcopy(void *pcpudst, const void *src, } #endif /* CONFIG_SMP */ -#ifdef CONFIG_MODULE_UNLOAD #define MODINFO_ATTR(field) \ static void setup_modinfo_##field(struct module *mod, const char *s) \ { \ @@ -461,12 +460,7 @@ static struct module_attribute modinfo_##field = { \ MODINFO_ATTR(version); MODINFO_ATTR(srcversion); -static struct module_attribute *modinfo_attrs[] = { - &modinfo_version, - &modinfo_srcversion, - NULL, -}; - +#ifdef CONFIG_MODULE_UNLOAD /* Init the unload section of the module. */ static void module_unload_init(struct module *mod) { @@ -781,6 +775,15 @@ static inline void module_unload_init(struct module *mod) } #endif /* CONFIG_MODULE_UNLOAD */ +static struct module_attribute *modinfo_attrs[] = { + &modinfo_version, + &modinfo_srcversion, +#ifdef CONFIG_MODULE_UNLOAD + &refcnt, +#endif + NULL, +}; + #ifdef CONFIG_OBSOLETE_MODPARM /* Bounds checking done below */ static int obsparm_copy_string(const char *val, struct kernel_param *kp) @@ -1106,37 +1109,28 @@ static inline void remove_sect_attrs(struct module *mod) } #endif /* CONFIG_KALLSYMS */ - -#ifdef CONFIG_MODULE_UNLOAD -static inline int module_add_refcnt_attr(struct module *mod) -{ - return sysfs_create_file(&mod->mkobj.kobj, &refcnt.attr); -} -static void module_remove_refcnt_attr(struct module *mod) -{ - return sysfs_remove_file(&mod->mkobj.kobj, &refcnt.attr); -} -#else -static inline int module_add_refcnt_attr(struct module *mod) -{ - return 0; -} -static void module_remove_refcnt_attr(struct module *mod) -{ -} -#endif - -#ifdef CONFIG_MODULE_UNLOAD static int module_add_modinfo_attrs(struct module *mod) { struct module_attribute *attr; + struct module_attribute *temp_attr; int error = 0; int i; + mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) * + (ARRAY_SIZE(modinfo_attrs) + 1)), + GFP_KERNEL); + if (!mod->modinfo_attrs) + return -ENOMEM; + + temp_attr = mod->modinfo_attrs; for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || - (attr->test && attr->test(mod))) - error = sysfs_create_file(&mod->mkobj.kobj,&attr->attr); + (attr->test && attr->test(mod))) { + memcpy(temp_attr, attr, sizeof(*temp_attr)); + temp_attr->attr.owner = mod; + error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); + ++temp_attr; + } } return error; } @@ -1146,12 +1140,16 @@ static void module_remove_modinfo_attrs(struct module *mod) struct module_attribute *attr; int i; - for (i = 0; (attr = modinfo_attrs[i]); i++) { + for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) { + /* pick a field to test for end of list */ + if (!attr->attr.name) + break; sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); - attr->free(mod); + if (attr->free) + attr->free(mod); } + kfree(mod->modinfo_attrs); } -#endif static int mod_sysfs_setup(struct module *mod, struct kernel_param *kparam, @@ -1169,19 +1167,13 @@ static int mod_sysfs_setup(struct module *mod, if (err) goto out; - err = module_add_refcnt_attr(mod); - if (err) - goto out_unreg; - err = module_param_sysfs_setup(mod, kparam, num_params); if (err) goto out_unreg; -#ifdef CONFIG_MODULE_UNLOAD err = module_add_modinfo_attrs(mod); if (err) goto out_unreg; -#endif return 0; @@ -1193,10 +1185,7 @@ out: static void mod_kobject_remove(struct module *mod) { -#ifdef CONFIG_MODULE_UNLOAD module_remove_modinfo_attrs(mod); -#endif - module_remove_refcnt_attr(mod); module_param_sysfs_remove(mod); kobject_unregister(&mod->mkobj.kobj); @@ -1474,7 +1463,6 @@ static char *get_modinfo(Elf_Shdr *sechdrs, return NULL; } -#ifdef CONFIG_MODULE_UNLOAD static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs, unsigned int infoindex) { @@ -1489,7 +1477,6 @@ static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs, attr->attr.name)); } } -#endif #ifdef CONFIG_KALLSYMS int is_exported(const char *name, const struct module *mod) @@ -1803,10 +1790,8 @@ static struct module *load_module(void __user *umod, if (strcmp(mod->name, "driverloader") == 0) add_taint(TAINT_PROPRIETARY_MODULE); -#ifdef CONFIG_MODULE_UNLOAD /* Set up MODINFO_ATTR fields */ setup_modinfo(mod, sechdrs, infoindex); -#endif /* Fix up syms, so that st_value is a pointer to location. */ err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex, diff --git a/kernel/params.c b/kernel/params.c index c76ad25e6a2..a2915058231 100644 --- a/kernel/params.c +++ b/kernel/params.c @@ -638,13 +638,8 @@ static ssize_t module_attr_show(struct kobject *kobj, if (!attribute->show) return -EIO; - if (!try_module_get(mk->mod)) - return -ENODEV; - ret = attribute->show(attribute, mk->mod, buf); - module_put(mk->mod); - return ret; } @@ -662,13 +657,8 @@ static ssize_t module_attr_store(struct kobject *kobj, if (!attribute->store) return -EIO; - if (!try_module_get(mk->mod)) - return -ENODEV; - ret = attribute->store(attribute, mk->mod, buf, len); - module_put(mk->mod); - return ret; } -- cgit v1.2.3-70-g09d2 From 97d1f15b7ef52c1e9c28dc48b454024bb53a5fd2 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Thu, 23 Mar 2006 03:00:24 -0800 Subject: [PATCH] sem2mutex: kernel/ Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Arjan van de Ven Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/kthread.c | 7 ++++--- kernel/module.c | 15 ++++++++------- kernel/posix-timers.c | 1 + kernel/power/pm.c | 21 +++++++++++---------- kernel/profile.c | 11 ++++++----- lib/reed_solomon/reed_solomon.c | 11 ++++++----- 6 files changed, 36 insertions(+), 30 deletions(-) (limited to 'kernel/module.c') diff --git a/kernel/kthread.c b/kernel/kthread.c index e75950a1092..6a5373868a9 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -12,6 +12,7 @@ #include #include #include +#include #include /* @@ -41,7 +42,7 @@ struct kthread_stop_info /* Thread stopping is done by setthing this var: lock serializes * multiple kthread_stop calls. */ -static DECLARE_MUTEX(kthread_stop_lock); +static DEFINE_MUTEX(kthread_stop_lock); static struct kthread_stop_info kthread_stop_info; int kthread_should_stop(void) @@ -173,7 +174,7 @@ int kthread_stop_sem(struct task_struct *k, struct semaphore *s) { int ret; - down(&kthread_stop_lock); + mutex_lock(&kthread_stop_lock); /* It could exit after stop_info.k set, but before wake_up_process. */ get_task_struct(k); @@ -194,7 +195,7 @@ int kthread_stop_sem(struct task_struct *k, struct semaphore *s) wait_for_completion(&kthread_stop_info.done); kthread_stop_info.k = NULL; ret = kthread_stop_info.err; - up(&kthread_stop_lock); + mutex_unlock(&kthread_stop_lock); return ret; } diff --git a/kernel/module.c b/kernel/module.c index 77764f22f02..de6312da6bb 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include #include @@ -63,15 +64,15 @@ static DEFINE_SPINLOCK(modlist_lock); static DECLARE_MUTEX(module_mutex); static LIST_HEAD(modules); -static DECLARE_MUTEX(notify_mutex); +static DEFINE_MUTEX(notify_mutex); static struct notifier_block * module_notify_list; int register_module_notifier(struct notifier_block * nb) { int err; - down(¬ify_mutex); + mutex_lock(¬ify_mutex); err = notifier_chain_register(&module_notify_list, nb); - up(¬ify_mutex); + mutex_unlock(¬ify_mutex); return err; } EXPORT_SYMBOL(register_module_notifier); @@ -79,9 +80,9 @@ EXPORT_SYMBOL(register_module_notifier); int unregister_module_notifier(struct notifier_block * nb) { int err; - down(¬ify_mutex); + mutex_lock(¬ify_mutex); err = notifier_chain_unregister(&module_notify_list, nb); - up(¬ify_mutex); + mutex_unlock(¬ify_mutex); return err; } EXPORT_SYMBOL(unregister_module_notifier); @@ -1989,9 +1990,9 @@ sys_init_module(void __user *umod, /* Drop lock so they can recurse */ up(&module_mutex); - down(¬ify_mutex); + mutex_lock(¬ify_mutex); notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); - up(¬ify_mutex); + mutex_unlock(¬ify_mutex); /* Start the module */ if (mod->init != NULL) diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index fa895fc2ecf..9944379360b 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -35,6 +35,7 @@ #include #include #include +#include #include #include diff --git a/kernel/power/pm.c b/kernel/power/pm.c index 33c508e857d..0f6908cce1d 100644 --- a/kernel/power/pm.c +++ b/kernel/power/pm.c @@ -25,6 +25,7 @@ #include #include #include +#include int pm_active; @@ -40,7 +41,7 @@ int pm_active; * until a resume but that will be fine. */ -static DECLARE_MUTEX(pm_devs_lock); +static DEFINE_MUTEX(pm_devs_lock); static LIST_HEAD(pm_devs); /** @@ -67,9 +68,9 @@ struct pm_dev *pm_register(pm_dev_t type, dev->id = id; dev->callback = callback; - down(&pm_devs_lock); + mutex_lock(&pm_devs_lock); list_add(&dev->entry, &pm_devs); - up(&pm_devs_lock); + mutex_unlock(&pm_devs_lock); } return dev; } @@ -85,9 +86,9 @@ struct pm_dev *pm_register(pm_dev_t type, void pm_unregister(struct pm_dev *dev) { if (dev) { - down(&pm_devs_lock); + mutex_lock(&pm_devs_lock); list_del(&dev->entry); - up(&pm_devs_lock); + mutex_unlock(&pm_devs_lock); kfree(dev); } @@ -118,7 +119,7 @@ void pm_unregister_all(pm_callback callback) if (!callback) return; - down(&pm_devs_lock); + mutex_lock(&pm_devs_lock); entry = pm_devs.next; while (entry != &pm_devs) { struct pm_dev *dev = list_entry(entry, struct pm_dev, entry); @@ -126,7 +127,7 @@ void pm_unregister_all(pm_callback callback) if (dev->callback == callback) __pm_unregister(dev); } - up(&pm_devs_lock); + mutex_unlock(&pm_devs_lock); } /** @@ -234,7 +235,7 @@ int pm_send_all(pm_request_t rqst, void *data) { struct list_head *entry; - down(&pm_devs_lock); + mutex_lock(&pm_devs_lock); entry = pm_devs.next; while (entry != &pm_devs) { struct pm_dev *dev = list_entry(entry, struct pm_dev, entry); @@ -246,13 +247,13 @@ int pm_send_all(pm_request_t rqst, void *data) */ if (rqst == PM_SUSPEND) pm_undo_all(dev); - up(&pm_devs_lock); + mutex_unlock(&pm_devs_lock); return status; } } entry = entry->next; } - up(&pm_devs_lock); + mutex_unlock(&pm_devs_lock); return 0; } diff --git a/kernel/profile.c b/kernel/profile.c index f89248e6d70..ad81f799a9b 100644 --- a/kernel/profile.c +++ b/kernel/profile.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -44,7 +45,7 @@ static cpumask_t prof_cpu_mask = CPU_MASK_ALL; #ifdef CONFIG_SMP static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits); static DEFINE_PER_CPU(int, cpu_profile_flip); -static DECLARE_MUTEX(profile_flip_mutex); +static DEFINE_MUTEX(profile_flip_mutex); #endif /* CONFIG_SMP */ static int __init profile_setup(char * str) @@ -243,7 +244,7 @@ static void profile_flip_buffers(void) { int i, j, cpu; - down(&profile_flip_mutex); + mutex_lock(&profile_flip_mutex); j = per_cpu(cpu_profile_flip, get_cpu()); put_cpu(); on_each_cpu(__profile_flip_buffers, NULL, 0, 1); @@ -259,14 +260,14 @@ static void profile_flip_buffers(void) hits[i].hits = hits[i].pc = 0; } } - up(&profile_flip_mutex); + mutex_unlock(&profile_flip_mutex); } static void profile_discard_flip_buffers(void) { int i, cpu; - down(&profile_flip_mutex); + mutex_lock(&profile_flip_mutex); i = per_cpu(cpu_profile_flip, get_cpu()); put_cpu(); on_each_cpu(__profile_flip_buffers, NULL, 0, 1); @@ -274,7 +275,7 @@ static void profile_discard_flip_buffers(void) struct profile_hit *hits = per_cpu(cpu_profile_hits, cpu)[i]; memset(hits, 0, NR_PROFILE_HIT*sizeof(struct profile_hit)); } - up(&profile_flip_mutex); + mutex_unlock(&profile_flip_mutex); } void profile_hit(int type, void *__pc) diff --git a/lib/reed_solomon/reed_solomon.c b/lib/reed_solomon/reed_solomon.c index f5fef948a41..f8ac9fa95de 100644 --- a/lib/reed_solomon/reed_solomon.c +++ b/lib/reed_solomon/reed_solomon.c @@ -44,12 +44,13 @@ #include #include #include +#include #include /* This list holds all currently allocated rs control structures */ static LIST_HEAD (rslist); /* Protection for the list */ -static DECLARE_MUTEX(rslistlock); +static DEFINE_MUTEX(rslistlock); /** * rs_init - Initialize a Reed-Solomon codec @@ -161,7 +162,7 @@ errrs: */ void free_rs(struct rs_control *rs) { - down(&rslistlock); + mutex_lock(&rslistlock); rs->users--; if(!rs->users) { list_del(&rs->list); @@ -170,7 +171,7 @@ void free_rs(struct rs_control *rs) kfree(rs->genpoly); kfree(rs); } - up(&rslistlock); + mutex_unlock(&rslistlock); } /** @@ -201,7 +202,7 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, if (nroots < 0 || nroots >= (1<list, &rslist); } out: - up(&rslistlock); + mutex_unlock(&rslistlock); return rs; } -- cgit v1.2.3-70-g09d2 From 6389a385114ae358693f213266de6468ea116c77 Mon Sep 17 00:00:00 2001 From: Ashutosh Naik Date: Thu, 23 Mar 2006 03:00:46 -0800 Subject: [PATCH] kernel/module.c Semaphore to Mutex Conversion for module_mutex This patch converts the module_mutex semaphore to a mutex. Signed-off-by: Ashutosh Naik Cc: Arjan van de Ven Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/module.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-) (limited to 'kernel/module.c') diff --git a/kernel/module.c b/kernel/module.c index de6312da6bb..fb404299082 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -61,7 +61,7 @@ static DEFINE_SPINLOCK(modlist_lock); /* List of modules, protected by module_mutex AND modlist_lock */ -static DECLARE_MUTEX(module_mutex); +static DEFINE_MUTEX(module_mutex); static LIST_HEAD(modules); static DEFINE_MUTEX(notify_mutex); @@ -602,7 +602,7 @@ static void free_module(struct module *mod); static void wait_for_zero_refcount(struct module *mod) { /* Since we might sleep for some time, drop the semaphore first */ - up(&module_mutex); + mutex_unlock(&module_mutex); for (;;) { DEBUGP("Looking at refcount...\n"); set_current_state(TASK_UNINTERRUPTIBLE); @@ -611,7 +611,7 @@ static void wait_for_zero_refcount(struct module *mod) schedule(); } current->state = TASK_RUNNING; - down(&module_mutex); + mutex_lock(&module_mutex); } asmlinkage long @@ -628,7 +628,7 @@ sys_delete_module(const char __user *name_user, unsigned int flags) return -EFAULT; name[MODULE_NAME_LEN-1] = '\0'; - if (down_interruptible(&module_mutex) != 0) + if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; mod = find_module(name); @@ -677,14 +677,14 @@ sys_delete_module(const char __user *name_user, unsigned int flags) /* Final destruction now noone is using it. */ if (mod->exit != NULL) { - up(&module_mutex); + mutex_unlock(&module_mutex); mod->exit(); - down(&module_mutex); + mutex_lock(&module_mutex); } free_module(mod); out: - up(&module_mutex); + mutex_unlock(&module_mutex); return ret; } @@ -1973,13 +1973,13 @@ sys_init_module(void __user *umod, return -EPERM; /* Only one module load at a time, please */ - if (down_interruptible(&module_mutex) != 0) + if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; /* Do all the hard work */ mod = load_module(umod, len, uargs); if (IS_ERR(mod)) { - up(&module_mutex); + mutex_unlock(&module_mutex); return PTR_ERR(mod); } @@ -1988,7 +1988,7 @@ sys_init_module(void __user *umod, stop_machine_run(__link_module, mod, NR_CPUS); /* Drop lock so they can recurse */ - up(&module_mutex); + mutex_unlock(&module_mutex); mutex_lock(¬ify_mutex); notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); @@ -2007,15 +2007,15 @@ sys_init_module(void __user *umod, mod->name); else { module_put(mod); - down(&module_mutex); + mutex_lock(&module_mutex); free_module(mod); - up(&module_mutex); + mutex_unlock(&module_mutex); } return ret; } /* Now it's a first class citizen! */ - down(&module_mutex); + mutex_lock(&module_mutex); mod->state = MODULE_STATE_LIVE; /* Drop initial reference. */ module_put(mod); @@ -2023,7 +2023,7 @@ sys_init_module(void __user *umod, mod->module_init = NULL; mod->init_size = 0; mod->init_text_size = 0; - up(&module_mutex); + mutex_unlock(&module_mutex); return 0; } @@ -2113,7 +2113,7 @@ struct module *module_get_kallsym(unsigned int symnum, { struct module *mod; - down(&module_mutex); + mutex_lock(&module_mutex); list_for_each_entry(mod, &modules, list) { if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; @@ -2121,12 +2121,12 @@ struct module *module_get_kallsym(unsigned int symnum, strncpy(namebuf, mod->strtab + mod->symtab[symnum].st_name, 127); - up(&module_mutex); + mutex_unlock(&module_mutex); return mod; } symnum -= mod->num_symtab; } - up(&module_mutex); + mutex_unlock(&module_mutex); return NULL; } @@ -2169,7 +2169,7 @@ static void *m_start(struct seq_file *m, loff_t *pos) struct list_head *i; loff_t n = 0; - down(&module_mutex); + mutex_lock(&module_mutex); list_for_each(i, &modules) { if (n++ == *pos) break; @@ -2190,7 +2190,7 @@ static void *m_next(struct seq_file *m, void *p, loff_t *pos) static void m_stop(struct seq_file *m, void *p) { - up(&module_mutex); + mutex_unlock(&module_mutex); } static int m_show(struct seq_file *m, void *p) -- cgit v1.2.3-70-g09d2 From 24277dda3a54aa5e6265487e1a3091e27f3c0c45 Mon Sep 17 00:00:00 2001 From: Davi Arnaut Date: Fri, 24 Mar 2006 03:18:43 -0800 Subject: [PATCH] strndup_user: convert module Change hand-coded userspace string copying to strndup_user. Signed-off-by: Davi Arnaut Cc: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/module.c | 19 +++---------------- 1 file changed, 3 insertions(+), 16 deletions(-) (limited to 'kernel/module.c') diff --git a/kernel/module.c b/kernel/module.c index fb404299082..54623c714bb 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1572,7 +1572,6 @@ static struct module *load_module(void __user *umod, exportindex, modindex, obsparmindex, infoindex, gplindex, crcindex, gplcrcindex, versindex, pcpuindex, gplfutureindex, gplfuturecrcindex; - long arglen; struct module *mod; long err = 0; void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */ @@ -1691,23 +1690,11 @@ static struct module *load_module(void __user *umod, } /* Now copy in args */ - arglen = strlen_user(uargs); - if (!arglen) { - err = -EFAULT; - goto free_hdr; - } - args = kmalloc(arglen, GFP_KERNEL); - if (!args) { - err = -ENOMEM; + args = strndup_user(uargs, ~0UL >> 1); + if (IS_ERR(args)) { + err = PTR_ERR(args); goto free_hdr; } - if (copy_from_user(args, uargs, arglen) != 0) { - err = -EFAULT; - goto free_mod; - } - - /* Userspace could have altered the string after the strlen_user() */ - args[arglen - 1] = '\0'; if (find_module(mod->name)) { err = -EEXIST; -- cgit v1.2.3-70-g09d2 From 8d3b33f67fdc0fb364a1ef6d8fbbea7c2e4e6c98 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Sat, 25 Mar 2006 03:07:05 -0800 Subject: [PATCH] Remove MODULE_PARM MODULE_PARM was actually breaking: recent gcc version optimize them out as unused. It's time to replace the last users, which are generally in the most unloved drivers anyway. Signed-off-by: Rusty Russell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- Documentation/networking/ray_cs.txt | 2 +- Documentation/sound/oss/Introduction | 2 +- Documentation/sound/oss/cs46xx | 16 +-- arch/ppc/8xx_io/cs4218_tdm.c | 10 +- drivers/block/ataflop.c | 4 +- drivers/cdrom/cm206.c | 8 +- drivers/cdrom/sbpcd.c | 10 +- drivers/char/istallion.c | 8 +- drivers/char/mxser.c | 8 +- drivers/char/riscom8.c | 8 +- drivers/isdn/hardware/avm/b1dma.c | 2 +- drivers/isdn/hardware/avm/b1isa.c | 4 +- drivers/isdn/hardware/avm/c4.c | 2 +- drivers/isdn/hardware/avm/t1isa.c | 6 +- drivers/isdn/hysdn/hycapi.c | 2 +- drivers/isdn/hysdn/hysdn_net.c | 2 +- drivers/isdn/isdnloop/isdnloop.c | 2 +- drivers/media/video/zr36120.c | 8 +- drivers/mmc/au1xmmc.c | 2 +- drivers/mtd/maps/pcmciamtd.c | 14 +-- drivers/net/atari_bionet.c | 2 +- drivers/net/atari_pamsnet.c | 2 +- drivers/net/atarilance.c | 2 +- drivers/net/cassini.c | 11 ++- drivers/net/chelsio/cxgb2.c | 2 +- drivers/net/fec_8xx/fec_main.c | 4 +- drivers/net/fs_enet/fs_enet-main.c | 4 +- drivers/net/gt96100eth.c | 4 +- drivers/net/hamradio/dmascc.c | 2 +- drivers/net/hamradio/mkiss.c | 2 +- drivers/net/irda/irport.c | 4 +- drivers/net/lasi_82596.c | 6 +- drivers/net/mac89x0.c | 2 +- drivers/net/mace.c | 2 +- drivers/net/meth.c | 2 +- drivers/net/ne-h8300.c | 6 +- drivers/net/ni5010.c | 4 +- drivers/net/sun3lance.c | 2 +- drivers/s390/block/dasd.c | 1 - drivers/s390/block/dasd_devmap.c | 3 + drivers/scsi/arm/cumana_2.c | 2 +- drivers/scsi/arm/eesox.c | 2 +- drivers/scsi/arm/powertec.c | 2 +- drivers/scsi/atari_scsi.c | 10 +- drivers/video/pm3fb.c | 18 ++-- include/linux/module.h | 19 ---- include/video/pm3fb.h | 3 - init/Kconfig | 9 -- kernel/module.c | 183 +++-------------------------------- kernel/rcutorture.c | 10 +- sound/oss/au1000.c | 2 +- sound/oss/au1550_ac97.c | 2 +- sound/oss/dmasound/dmasound_core.c | 10 +- sound/oss/ite8172.c | 4 +- sound/oss/swarm_cs4297a.c | 4 +- sound/oss/waveartist.c | 8 +- 56 files changed, 146 insertions(+), 329 deletions(-) (limited to 'kernel/module.c') diff --git a/Documentation/networking/ray_cs.txt b/Documentation/networking/ray_cs.txt index 5427f8c7df9..145d27a5239 100644 --- a/Documentation/networking/ray_cs.txt +++ b/Documentation/networking/ray_cs.txt @@ -25,7 +25,7 @@ the essid= string parameter is available via the kernel command line. This will change after the method of sorting out parameters for all the PCMCIA drivers is agreed upon. If you must have a built in driver with nondefault parameters, they can be edited in -/usr/src/linux/drivers/net/pcmcia/ray_cs.c. Searching for MODULE_PARM +/usr/src/linux/drivers/net/pcmcia/ray_cs.c. Searching for module_param will find them all. Information on card services is available at: diff --git a/Documentation/sound/oss/Introduction b/Documentation/sound/oss/Introduction index 15d4fb975ac..f04ba6bb739 100644 --- a/Documentation/sound/oss/Introduction +++ b/Documentation/sound/oss/Introduction @@ -69,7 +69,7 @@ are available, for example IRQ, address, DMA. Warning, the options for different cards sometime use different names for the same or a similar feature (dma1= versus dma16=). As a last -resort, inspect the code (search for MODULE_PARM). +resort, inspect the code (search for module_param). Notes: diff --git a/Documentation/sound/oss/cs46xx b/Documentation/sound/oss/cs46xx index 88d6cf8b39f..b5443270986 100644 --- a/Documentation/sound/oss/cs46xx +++ b/Documentation/sound/oss/cs46xx @@ -88,7 +88,7 @@ parameters. for a copy email: twoller@crystal.cirrus.com MODULE_PARMS definitions ------------------------ -MODULE_PARM(defaultorder, "i"); +module_param(defaultorder, ulong, 0); defaultorder=N where N is a value from 1 to 12 The buffer order determines the size of the dma buffer for the driver. @@ -98,18 +98,18 @@ to not underrun the dma buffer as easily. As default, use 32k (order=3) rather than 64k as some of the games work more responsively. (2^N) * PAGE_SIZE = allocated buffer size -MODULE_PARM(cs_debuglevel, "i"); -MODULE_PARM(cs_debugmask, "i"); +module_param(cs_debuglevel, ulong, 0644); +module_param(cs_debugmask, ulong, 0644); cs_debuglevel=N cs_debugmask=0xMMMMMMMM where N is a value from 0 (no debug printfs), to 9 (maximum) 0xMMMMMMMM is a debug mask corresponding to the CS_xxx bits (see driver source). -MODULE_PARM(hercules_egpio_disable, "i"); +module_param(hercules_egpio_disable, ulong, 0); hercules_egpio_disable=N where N is a 0 (enable egpio), or a 1 (disable egpio support) -MODULE_PARM(initdelay, "i"); +module_param(initdelay, ulong, 0); initdelay=N This value is used to determine the millescond delay during the initialization code prior to powering up the PLL. On laptops this value can be used to @@ -118,19 +118,19 @@ system is booted under battery power then the mdelay()/udelay() functions fail t properly delay the required time. Also, if the system is booted under AC power and then the power removed, the mdelay()/udelay() functions will not delay properly. -MODULE_PARM(powerdown, "i"); +module_param(powerdown, ulong, 0); powerdown=N where N is 0 (disable any powerdown of the internal blocks) or 1 (enable powerdown) -MODULE_PARM(external_amp, "i"); +module_param(external_amp, bool, 0); external_amp=1 if N is set to 1, then force enabling the EAPD support in the primary AC97 codec. override the detection logic and force the external amp bit in the AC97 0x26 register to be reset (0). EAPD should be 0 for powerup, and 1 for powerdown. The VTB Santa Cruz card has inverted logic, so there is a special function for these cards. -MODULE_PARM(thinkpad, "i"); +module_param(thinkpad, bool, 0); thinkpad=1 if N is set to 1, then force enabling the clkrun functionality. Currently, when the part is being used, then clkrun is disabled for the entire system, diff --git a/arch/ppc/8xx_io/cs4218_tdm.c b/arch/ppc/8xx_io/cs4218_tdm.c index 49eb2a7e65c..a892356d5c3 100644 --- a/arch/ppc/8xx_io/cs4218_tdm.c +++ b/arch/ppc/8xx_io/cs4218_tdm.c @@ -126,11 +126,11 @@ static int numReadBufs = 4, readbufSize = 32; */ static volatile cbd_t *rx_base, *rx_cur, *tx_base, *tx_cur; -MODULE_PARM(catchRadius, "i"); -MODULE_PARM(numBufs, "i"); -MODULE_PARM(bufSize, "i"); -MODULE_PARM(numreadBufs, "i"); -MODULE_PARM(readbufSize, "i"); +module_param(catchRadius, int, 0); +module_param(numBufs, int, 0); +module_param(bufSize, int, 0); +module_param(numreadBufs, int, 0); +module_param(readbufSize, int, 0); #define arraysize(x) (sizeof(x)/sizeof(*(x))) #define le2be16(x) (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff)) diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c index f8ce235ccfc..c39650920bd 100644 --- a/drivers/block/ataflop.c +++ b/drivers/block/ataflop.c @@ -271,7 +271,7 @@ unsigned char *DMABuffer; /* buffer for writes */ static unsigned long PhysDMABuffer; /* physical address */ static int UseTrackbuffer = -1; /* Do track buffering? */ -MODULE_PARM(UseTrackbuffer, "i"); +module_param(UseTrackbuffer, int, 0); unsigned char *TrackBuffer; /* buffer for reads */ static unsigned long PhysTrackBuffer; /* physical address */ @@ -296,7 +296,7 @@ static int MotorOn = 0, MotorOffTrys; static int IsFormatting = 0, FormatError; static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; -MODULE_PARM(UserSteprate, "1-" __MODULE_STRING(FD_MAX_UNITS) "i"); +module_param_array(UserSteprate, int, NULL, 0); /* Synchronization of FDC access. */ static volatile int fdc_busy = 0; diff --git a/drivers/cdrom/cm206.c b/drivers/cdrom/cm206.c index fad27a87ce3..f43a988dd41 100644 --- a/drivers/cdrom/cm206.c +++ b/drivers/cdrom/cm206.c @@ -218,12 +218,12 @@ static int cm206_base = CM206_BASE; static int cm206_irq = CM206_IRQ; #ifdef MODULE static int cm206[2] = { 0, 0 }; /* for compatible `insmod' parameter passing */ +module_param_array(cm206, int, NULL, 0); /* base,irq or irq,base */ #endif -MODULE_PARM(cm206_base, "i"); /* base */ -MODULE_PARM(cm206_irq, "i"); /* irq */ -MODULE_PARM(cm206, "1-2i"); /* base,irq or irq,base */ -MODULE_PARM(auto_probe, "i"); /* auto probe base and irq */ +module_param(cm206_base, int, 0); /* base */ +module_param(cm206_irq, int, 0); /* irq */ +module_param(auto_probe, bool, 0); /* auto probe base and irq */ MODULE_LICENSE("GPL"); #define POLLOOP 100 /* milliseconds */ diff --git a/drivers/cdrom/sbpcd.c b/drivers/cdrom/sbpcd.c index 4760f515f59..05c9e865eca 100644 --- a/drivers/cdrom/sbpcd.c +++ b/drivers/cdrom/sbpcd.c @@ -464,8 +464,13 @@ static int sbpcd[] = static __cacheline_aligned DEFINE_SPINLOCK(sbpcd_lock); static struct request_queue *sbpcd_queue; -MODULE_PARM(sbpcd, "2i"); -MODULE_PARM(max_drives, "i"); +/* You can only set the first pair, from old MODULE_PARM code. */ +static int sbpcd_set(const char *val, struct kernel_param *kp) +{ + get_options((char *)val, 2, (int *)sbpcd); + return 0; +} +module_param_call(sbpcd, sbpcd_set, NULL, NULL, 0); #define NUM_PROBE (sizeof(sbpcd) / sizeof(int)) @@ -553,6 +558,7 @@ static unsigned char msgnum; static char msgbuf[80]; static int max_drives = MAX_DRIVES; +module_param(max_drives, int, 0); #ifndef MODULE static unsigned char setup_done; static const char *str_sb_l = "soundblaster"; diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c index ede128356af..e5247f85a44 100644 --- a/drivers/char/istallion.c +++ b/drivers/char/istallion.c @@ -378,13 +378,13 @@ MODULE_DESCRIPTION("Stallion Intelligent Multiport Serial Driver"); MODULE_LICENSE("GPL"); -MODULE_PARM(board0, "1-3s"); +module_param_array(board0, charp, NULL, 0); MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,memaddr]"); -MODULE_PARM(board1, "1-3s"); +module_param_array(board1, charp, NULL, 0); MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,memaddr]"); -MODULE_PARM(board2, "1-3s"); +module_param_array(board2, charp, NULL, 0); MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,memaddr]"); -MODULE_PARM(board3, "1-3s"); +module_param_array(board3, charp, NULL, 0); MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,memaddr]"); #endif diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c index ea725a9964e..0fb2fb9fb02 100644 --- a/drivers/char/mxser.c +++ b/drivers/char/mxser.c @@ -243,10 +243,10 @@ static int verbose = 0; MODULE_AUTHOR("Casper Yang"); MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); -MODULE_PARM(ioaddr, "1-4i"); -MODULE_PARM(ttymajor, "i"); -MODULE_PARM(calloutmajor, "i"); -MODULE_PARM(verbose, "i"); +module_param_array(ioaddr, int, NULL, 0); +module_param(ttymajor, int, 0); +module_param(calloutmajor, int, 0); +module_param(verbose, bool, 0); MODULE_LICENSE("GPL"); struct mxser_log { diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c index 119e629656b..657c0d88f48 100644 --- a/drivers/char/riscom8.c +++ b/drivers/char/riscom8.c @@ -1743,10 +1743,10 @@ static int iobase; static int iobase1; static int iobase2; static int iobase3; -MODULE_PARM(iobase, "i"); -MODULE_PARM(iobase1, "i"); -MODULE_PARM(iobase2, "i"); -MODULE_PARM(iobase3, "i"); +module_param(iobase, int, 0); +module_param(iobase1, int, 0); +module_param(iobase2, int, 0); +module_param(iobase3, int, 0); MODULE_LICENSE("GPL"); #endif /* MODULE */ diff --git a/drivers/isdn/hardware/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c index 91dd0551fc7..4d64e5cbcdb 100644 --- a/drivers/isdn/hardware/avm/b1dma.c +++ b/drivers/isdn/hardware/avm/b1dma.c @@ -39,7 +39,7 @@ MODULE_AUTHOR("Carsten Paeth"); MODULE_LICENSE("GPL"); static int suppress_pollack = 0; -MODULE_PARM(suppress_pollack, "0-1i"); +module_param(suppress_pollack, bool, 0); /* ------------------------------------------------------------- */ diff --git a/drivers/isdn/hardware/avm/b1isa.c b/drivers/isdn/hardware/avm/b1isa.c index 38bd4dfecbd..80fb488848b 100644 --- a/drivers/isdn/hardware/avm/b1isa.c +++ b/drivers/isdn/hardware/avm/b1isa.c @@ -169,8 +169,8 @@ static struct pci_dev isa_dev[MAX_CARDS]; static int io[MAX_CARDS]; static int irq[MAX_CARDS]; -MODULE_PARM(io, "1-" __MODULE_STRING(MAX_CARDS) "i"); -MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_CARDS) "i"); +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); MODULE_PARM_DESC(io, "I/O base address(es)"); MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c index 724aac2c1cc..f7253b2136e 100644 --- a/drivers/isdn/hardware/avm/c4.c +++ b/drivers/isdn/hardware/avm/c4.c @@ -50,7 +50,7 @@ MODULE_DEVICE_TABLE(pci, c4_pci_tbl); MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM C2/C4 cards"); MODULE_AUTHOR("Carsten Paeth"); MODULE_LICENSE("GPL"); -MODULE_PARM(suppress_pollack, "0-1i"); +module_param(suppress_pollack, bool, 0); /* ------------------------------------------------------------- */ diff --git a/drivers/isdn/hardware/avm/t1isa.c b/drivers/isdn/hardware/avm/t1isa.c index 3b701d97bdf..5a2f854d55b 100644 --- a/drivers/isdn/hardware/avm/t1isa.c +++ b/drivers/isdn/hardware/avm/t1isa.c @@ -519,9 +519,9 @@ static int io[MAX_CARDS]; static int irq[MAX_CARDS]; static int cardnr[MAX_CARDS]; -MODULE_PARM(io, "1-" __MODULE_STRING(MAX_CARDS) "i"); -MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_CARDS) "i"); -MODULE_PARM(cardnr, "1-" __MODULE_STRING(MAX_CARDS) "i"); +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(cardnr, int, NULL, 0); MODULE_PARM_DESC(io, "I/O base address(es)"); MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); MODULE_PARM_DESC(cardnr, "Card number(s) (as jumpered)"); diff --git a/drivers/isdn/hysdn/hycapi.c b/drivers/isdn/hysdn/hycapi.c index 55fbea0b6ac..6bac43cc91b 100644 --- a/drivers/isdn/hysdn/hycapi.c +++ b/drivers/isdn/hysdn/hycapi.c @@ -31,7 +31,7 @@ static char hycapi_revision[]="$Revision: 1.8.6.4 $"; unsigned int hycapi_enable = 0xffffffff; -MODULE_PARM(hycapi_enable, "i"); +module_param(hycapi_enable, uint, 0); typedef struct _hycapi_appl { unsigned int ctrl_mask; diff --git a/drivers/isdn/hysdn/hysdn_net.c b/drivers/isdn/hysdn/hysdn_net.c index 683647b1f2b..d205249a124 100644 --- a/drivers/isdn/hysdn/hysdn_net.c +++ b/drivers/isdn/hysdn/hysdn_net.c @@ -24,7 +24,7 @@ #include "hysdn_defs.h" unsigned int hynet_enable = 0xffffffff; -MODULE_PARM(hynet_enable, "i"); +module_param(hynet_enable, uint, 0); /* store the actual version for log reporting */ char *hysdn_net_revision = "$Revision: 1.8.6.4 $"; diff --git a/drivers/isdn/isdnloop/isdnloop.c b/drivers/isdn/isdnloop/isdnloop.c index 33d33970041..a67d31af797 100644 --- a/drivers/isdn/isdnloop/isdnloop.c +++ b/drivers/isdn/isdnloop/isdnloop.c @@ -22,7 +22,7 @@ static char *isdnloop_id = "loop0"; MODULE_DESCRIPTION("ISDN4Linux: Pseudo Driver that simulates an ISDN card"); MODULE_AUTHOR("Fritz Elfert"); MODULE_LICENSE("GPL"); -MODULE_PARM(isdnloop_id, "s"); +module_param(isdnloop_id, charp, 0); MODULE_PARM_DESC(isdnloop_id, "ID-String of first card"); static int isdnloop_addcard(char *); diff --git a/drivers/media/video/zr36120.c b/drivers/media/video/zr36120.c index d4c633b8a7f..417a999afee 100644 --- a/drivers/media/video/zr36120.c +++ b/drivers/media/video/zr36120.c @@ -70,10 +70,10 @@ MODULE_AUTHOR("Pauline Middelink "); MODULE_DESCRIPTION("Zoran ZR36120 based framegrabber"); MODULE_LICENSE("GPL"); -MODULE_PARM(triton1,"i"); -MODULE_PARM(cardtype,"1-" __MODULE_STRING(ZORAN_MAX) "i"); -MODULE_PARM(video_nr,"i"); -MODULE_PARM(vbi_nr,"i"); +module_param(triton1, uint, 0); +module_param_array(cardtype, uint, NULL, 0); +module_param(video_nr, int, 0); +module_param(vbi_nr, int, 0); static int zoran_cards; static struct zoran zorans[ZORAN_MAX]; diff --git a/drivers/mmc/au1xmmc.c b/drivers/mmc/au1xmmc.c index 8d84b045bc8..85e89c77bde 100644 --- a/drivers/mmc/au1xmmc.c +++ b/drivers/mmc/au1xmmc.c @@ -87,7 +87,7 @@ struct au1xmmc_host *au1xmmc_hosts[AU1XMMC_CONTROLLER_COUNT]; static int dma = 1; #ifdef MODULE -MODULE_PARM(dma, "i"); +module_param(dma, bool, 0); MODULE_PARM_DESC(dma, "Use DMA engine for data transfers (0 = disabled)"); #endif diff --git a/drivers/mtd/maps/pcmciamtd.c b/drivers/mtd/maps/pcmciamtd.c index f0f8916da7a..f988c817e19 100644 --- a/drivers/mtd/maps/pcmciamtd.c +++ b/drivers/mtd/maps/pcmciamtd.c @@ -28,7 +28,7 @@ #ifdef CONFIG_MTD_DEBUG static int debug = CONFIG_MTD_DEBUG_VERBOSE; -MODULE_PARM(debug, "i"); +module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Set Debug Level 0=quiet, 5=noisy"); #undef DEBUG #define DEBUG(n, format, arg...) \ @@ -89,17 +89,17 @@ static int mem_type; MODULE_LICENSE("GPL"); MODULE_AUTHOR("Simon Evans "); MODULE_DESCRIPTION(DRIVER_DESC); -MODULE_PARM(bankwidth, "i"); +module_param(bankwidth, int, 0); MODULE_PARM_DESC(bankwidth, "Set bankwidth (1=8 bit, 2=16 bit, default=2)"); -MODULE_PARM(mem_speed, "i"); +module_param(mem_speed, int, 0); MODULE_PARM_DESC(mem_speed, "Set memory access speed in ns"); -MODULE_PARM(force_size, "i"); +module_param(force_size, int, 0); MODULE_PARM_DESC(force_size, "Force size of card in MiB (1-64)"); -MODULE_PARM(setvpp, "i"); +module_param(setvpp, int, 0); MODULE_PARM_DESC(setvpp, "Set Vpp (0=Never, 1=On writes, 2=Always on, default=0)"); -MODULE_PARM(vpp, "i"); +module_param(vpp, int, 0); MODULE_PARM_DESC(vpp, "Vpp value in 1/10ths eg 33=3.3V 120=12V (Dangerous)"); -MODULE_PARM(mem_type, "i"); +module_param(mem_type, int, 0); MODULE_PARM_DESC(mem_type, "Set Memory type (0=Flash, 1=RAM, 2=ROM, default=0)"); diff --git a/drivers/net/atari_bionet.c b/drivers/net/atari_bionet.c index 0095384ff45..5e5f80b99b9 100644 --- a/drivers/net/atari_bionet.c +++ b/drivers/net/atari_bionet.c @@ -123,7 +123,7 @@ static char version[] = * Global variable 'bionet_debug'. Can be set at load time by 'insmod' */ unsigned int bionet_debug = NET_DEBUG; -MODULE_PARM(bionet_debug, "i"); +module_param(bionet_debug, int, 0); MODULE_PARM_DESC(bionet_debug, "bionet debug level (0-2)"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/atari_pamsnet.c b/drivers/net/atari_pamsnet.c index 8b997809f9d..d6039e62d83 100644 --- a/drivers/net/atari_pamsnet.c +++ b/drivers/net/atari_pamsnet.c @@ -119,7 +119,7 @@ static char *version = * Global variable 'pamsnet_debug'. Can be set at load time by 'insmod' */ unsigned int pamsnet_debug = NET_DEBUG; -MODULE_PARM(pamsnet_debug, "i"); +module_param(pamsnet_debug, int, 0); MODULE_PARM_DESC(pamsnet_debug, "pamsnet debug enable (0-1)"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/atarilance.c b/drivers/net/atarilance.c index e01b6a78ec6..442b2cbeb58 100644 --- a/drivers/net/atarilance.c +++ b/drivers/net/atarilance.c @@ -78,7 +78,7 @@ static int lance_debug = LANCE_DEBUG; #else static int lance_debug = 1; #endif -MODULE_PARM(lance_debug, "i"); +module_param(lance_debug, int, 0); MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c index 8f1573e658a..ac48f754350 100644 --- a/drivers/net/cassini.c +++ b/drivers/net/cassini.c @@ -192,12 +192,15 @@ static char version[] __devinitdata = DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")\n"; +static int cassini_debug = -1; /* -1 == use CAS_DEF_MSG_ENABLE as value */ +static int link_mode; + MODULE_AUTHOR("Adrian Sun (asun@darksunrising.com)"); MODULE_DESCRIPTION("Sun Cassini(+) ethernet driver"); MODULE_LICENSE("GPL"); -MODULE_PARM(cassini_debug, "i"); +module_param(cassini_debug, int, 0); MODULE_PARM_DESC(cassini_debug, "Cassini bitmapped debugging message enable value"); -MODULE_PARM(link_mode, "i"); +module_param(link_mode, int, 0); MODULE_PARM_DESC(link_mode, "default link mode"); /* @@ -209,7 +212,7 @@ MODULE_PARM_DESC(link_mode, "default link mode"); * Value in seconds, for user input. */ static int linkdown_timeout = DEFAULT_LINKDOWN_TIMEOUT; -MODULE_PARM(linkdown_timeout, "i"); +module_param(linkdown_timeout, int, 0); MODULE_PARM_DESC(linkdown_timeout, "min reset interval in sec. for PCS linkdown issue; disabled if not positive"); @@ -221,8 +224,6 @@ MODULE_PARM_DESC(linkdown_timeout, static int link_transition_timeout; -static int cassini_debug = -1; /* -1 == use CAS_DEF_MSG_ENABLE as value */ -static int link_mode; static u16 link_modes[] __devinitdata = { BMCR_ANENABLE, /* 0 : autoneg */ diff --git a/drivers/net/chelsio/cxgb2.c b/drivers/net/chelsio/cxgb2.c index 349ebe783ed..7fe2638ae06 100644 --- a/drivers/net/chelsio/cxgb2.c +++ b/drivers/net/chelsio/cxgb2.c @@ -124,7 +124,7 @@ MODULE_LICENSE("GPL"); static int dflt_msg_enable = DFLT_MSG_ENABLE; -MODULE_PARM(dflt_msg_enable, "i"); +module_param(dflt_msg_enable, int, 0); MODULE_PARM_DESC(dflt_msg_enable, "Chelsio T1 message enable bitmap"); diff --git a/drivers/net/fec_8xx/fec_main.c b/drivers/net/fec_8xx/fec_main.c index b4f3a9f8a53..7e433809713 100644 --- a/drivers/net/fec_8xx/fec_main.c +++ b/drivers/net/fec_8xx/fec_main.c @@ -55,11 +55,11 @@ MODULE_AUTHOR("Pantelis Antoniou "); MODULE_DESCRIPTION("Motorola 8xx FEC ethernet driver"); MODULE_LICENSE("GPL"); -MODULE_PARM(fec_8xx_debug, "i"); +int fec_8xx_debug = -1; /* -1 == use FEC_8XX_DEF_MSG_ENABLE as value */ +module_param(fec_8xx_debug, int, 0); MODULE_PARM_DESC(fec_8xx_debug, "FEC 8xx bitmapped debugging message enable value"); -int fec_8xx_debug = -1; /* -1 == use FEC_8XX_DEF_MSG_ENABLE as value */ /*************************************************/ diff --git a/drivers/net/fs_enet/fs_enet-main.c b/drivers/net/fs_enet/fs_enet-main.c index f5d49a11065..196298f33db 100644 --- a/drivers/net/fs_enet/fs_enet-main.c +++ b/drivers/net/fs_enet/fs_enet-main.c @@ -58,11 +58,11 @@ MODULE_DESCRIPTION("Freescale Ethernet Driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_MODULE_VERSION); -MODULE_PARM(fs_enet_debug, "i"); +int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ +module_param(fs_enet_debug, int, 0); MODULE_PARM_DESC(fs_enet_debug, "Freescale bitmapped debugging message enable value"); -int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */ static void fs_set_multicast_list(struct net_device *dev) { diff --git a/drivers/net/gt96100eth.c b/drivers/net/gt96100eth.c index 5958a631472..2d243540461 100644 --- a/drivers/net/gt96100eth.c +++ b/drivers/net/gt96100eth.c @@ -114,8 +114,8 @@ static int max_interrupt_work = 32; static char mac0[18] = "00.02.03.04.05.06"; static char mac1[18] = "00.01.02.03.04.05"; -MODULE_PARM(mac0, "c18"); -MODULE_PARM(mac1, "c18"); +module_param_string(mac0, mac0, 18, 0); +module_param_string(mac1, mac0, 18, 0); MODULE_PARM_DESC(mac0, "MAC address for GT96100 ethernet port 0"); MODULE_PARM_DESC(mac1, "MAC address for GT96100 ethernet port 1"); diff --git a/drivers/net/hamradio/dmascc.c b/drivers/net/hamradio/dmascc.c index c8dc40214a0..79a8fbcf5f9 100644 --- a/drivers/net/hamradio/dmascc.c +++ b/drivers/net/hamradio/dmascc.c @@ -280,7 +280,7 @@ static unsigned long rand; MODULE_AUTHOR("Klaus Kudielka"); MODULE_DESCRIPTION("Driver for high-speed SCC boards"); -MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NUM_DEVS) "i"); +module_param_array(io, int, NULL, 0); MODULE_LICENSE("GPL"); static void __exit dmascc_exit(void) diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c index dc5e9d59dee..d81a8e1eeb8 100644 --- a/drivers/net/hamradio/mkiss.c +++ b/drivers/net/hamradio/mkiss.c @@ -1012,7 +1012,7 @@ static void __exit mkiss_exit_driver(void) MODULE_AUTHOR("Ralf Baechle DL5RB "); MODULE_DESCRIPTION("KISS driver for AX.25 over TTYs"); -MODULE_PARM(crc_force, "i"); +module_param(crc_force, int, 0); MODULE_PARM_DESC(crc_force, "crc [0 = auto | 1 = none | 2 = flexnet | 3 = smack]"); MODULE_LICENSE("GPL"); MODULE_ALIAS_LDISC(N_AX25); diff --git a/drivers/net/irda/irport.c b/drivers/net/irda/irport.c index 6070195b87b..98fa5319e5c 100644 --- a/drivers/net/irda/irport.c +++ b/drivers/net/irda/irport.c @@ -1118,9 +1118,9 @@ static void __exit irport_cleanup(void) } } -MODULE_PARM(io, "1-4i"); +module_param_array(io, int, NULL, 0); MODULE_PARM_DESC(io, "Base I/O addresses"); -MODULE_PARM(irq, "1-4i"); +module_param_array(irq, int, NULL, 0); MODULE_PARM_DESC(irq, "IRQ lines"); MODULE_AUTHOR("Dag Brattli "); diff --git a/drivers/net/lasi_82596.c b/drivers/net/lasi_82596.c index f7b7238d835..957888de3d7 100644 --- a/drivers/net/lasi_82596.c +++ b/drivers/net/lasi_82596.c @@ -177,7 +177,7 @@ static int i596_debug = (DEB_SERIOUS|DEB_PROBE); MODULE_AUTHOR("Richard Hirst"); MODULE_DESCRIPTION("i82596 driver"); MODULE_LICENSE("GPL"); -MODULE_PARM(i596_debug, "i"); +module_param(i596_debug, int, 0); MODULE_PARM_DESC(i596_debug, "lasi_82596 debug mask"); /* Copy frames shorter than rx_copybreak, otherwise pass on up in @@ -1520,9 +1520,9 @@ static void set_multicast_list(struct net_device *dev) } } -MODULE_PARM(debug, "i"); -MODULE_PARM_DESC(debug, "lasi_82596 debug mask"); static int debug = -1; +module_param(debug, int, 0); +MODULE_PARM_DESC(debug, "lasi_82596 debug mask"); static int num_drivers; static struct net_device *netdevs[MAX_DRIVERS]; diff --git a/drivers/net/mac89x0.c b/drivers/net/mac89x0.c index f65b0db111b..cd3c9a5a98b 100644 --- a/drivers/net/mac89x0.c +++ b/drivers/net/mac89x0.c @@ -629,7 +629,7 @@ static int set_mac_address(struct net_device *dev, void *addr) static struct net_device *dev_cs89x0; static int debug; -MODULE_PARM(debug, "i"); +module_param(debug, int, 0); MODULE_PARM_DESC(debug, "CS89[02]0 debug level (0-5)"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/mace.c b/drivers/net/mace.c index 2a5add257b8..77792b28602 100644 --- a/drivers/net/mace.c +++ b/drivers/net/mace.c @@ -1042,7 +1042,7 @@ static void __exit mace_cleanup(void) MODULE_AUTHOR("Paul Mackerras"); MODULE_DESCRIPTION("PowerMac MACE driver."); -MODULE_PARM(port_aaui, "i"); +module_param(port_aaui, int, 0); MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)"); MODULE_LICENSE("GPL"); diff --git a/drivers/net/meth.c b/drivers/net/meth.c index e23655f5049..d644bf3a933 100644 --- a/drivers/net/meth.c +++ b/drivers/net/meth.c @@ -62,7 +62,7 @@ MODULE_DESCRIPTION("SGI O2 Builtin Fast Ethernet driver"); #ifdef HAVE_TX_TIMEOUT static int timeout = TX_TIMEOUT; -MODULE_PARM(timeout, "i"); +module_param(timeout, int, 0); #endif /* diff --git a/drivers/net/ne-h8300.c b/drivers/net/ne-h8300.c index aaebd28a192..7ea3d596ac3 100644 --- a/drivers/net/ne-h8300.c +++ b/drivers/net/ne-h8300.c @@ -601,9 +601,9 @@ static int io[MAX_NE_CARDS]; static int irq[MAX_NE_CARDS]; static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */ -MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); -MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); -MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i"); +module_param_array(io, int, NULL, 0); +module_param_array(irq, int, NULL, 0); +module_param_array(bad, int, NULL, 0); MODULE_PARM_DESC(io, "I/O base address(es)"); MODULE_PARM_DESC(irq, "IRQ number(s)"); MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver"); diff --git a/drivers/net/ni5010.c b/drivers/net/ni5010.c index 2ab01a5d1d2..a68bf474f6e 100644 --- a/drivers/net/ni5010.c +++ b/drivers/net/ni5010.c @@ -766,8 +766,8 @@ static void ni5010_show_registers(struct net_device *dev) #ifdef MODULE static struct net_device *dev_ni5010; -MODULE_PARM(io, "i"); -MODULE_PARM(irq, "i"); +module_param(io, int, 0); +module_param(irq, int, 0); MODULE_PARM_DESC(io, "ni5010 I/O base address"); MODULE_PARM_DESC(irq, "ni5010 IRQ number"); diff --git a/drivers/net/sun3lance.c b/drivers/net/sun3lance.c index 01bdb233405..d4c0002b43d 100644 --- a/drivers/net/sun3lance.c +++ b/drivers/net/sun3lance.c @@ -71,7 +71,7 @@ static int lance_debug = LANCE_DEBUG; #else static int lance_debug = 1; #endif -MODULE_PARM(lance_debug, "i"); +module_param(lance_debug, int, 0); MODULE_PARM_DESC(lance_debug, "SUN3 Lance debug level (0-3)"); MODULE_LICENSE("GPL"); diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index dfe542b206c..7967916bda1 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -43,7 +43,6 @@ MODULE_AUTHOR("Holger Smolinski "); MODULE_DESCRIPTION("Linux on S/390 DASD device driver," " Copyright 2000 IBM Corporation"); MODULE_SUPPORTED_DEVICE("dasd"); -MODULE_PARM(dasd, "1-" __MODULE_STRING(256) "s"); MODULE_LICENSE("GPL"); /* diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index f576f243cd9..2f720108a7e 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -69,6 +70,8 @@ int dasd_autodetect = 0; /* is true, when autodetection is active */ * strings when running as a module. */ static char *dasd[256]; +module_param_array(dasd, charp, NULL, 0); + /* * Single spinlock to protect devmap structures and lists. */ diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c index 583d2d8c833..fad2109268b 100644 --- a/drivers/scsi/arm/cumana_2.c +++ b/drivers/scsi/arm/cumana_2.c @@ -550,6 +550,6 @@ module_exit(cumanascsi2_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines"); -MODULE_PARM(term, "1-8i"); +module_param_array(term, int, NULL, 0); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/arm/eesox.c b/drivers/scsi/arm/eesox.c index 3ffec7efc9d..dcbb4b2b3fe 100644 --- a/drivers/scsi/arm/eesox.c +++ b/drivers/scsi/arm/eesox.c @@ -674,6 +674,6 @@ module_exit(eesox_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("EESOX 'Fast' SCSI driver for Acorn machines"); -MODULE_PARM(term, "1-8i"); +module_param_array(term, int, NULL, 0); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/arm/powertec.c b/drivers/scsi/arm/powertec.c index 3113bdcedb1..3d69f6c45a6 100644 --- a/drivers/scsi/arm/powertec.c +++ b/drivers/scsi/arm/powertec.c @@ -466,6 +466,6 @@ module_exit(powertecscsi_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("Powertec SCSI driver"); -MODULE_PARM(term, "1-8i"); +module_param_array(term, int, NULL, 0); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); diff --git a/drivers/scsi/atari_scsi.c b/drivers/scsi/atari_scsi.c index f4c1ca7c157..f677c5a32a6 100644 --- a/drivers/scsi/atari_scsi.c +++ b/drivers/scsi/atari_scsi.c @@ -239,17 +239,17 @@ static int atari_read_overruns = 0; #endif static int setup_can_queue = -1; -MODULE_PARM(setup_can_queue, "i"); +module_param(setup_can_queue, int, 0); static int setup_cmd_per_lun = -1; -MODULE_PARM(setup_cmd_per_lun, "i"); +module_param(setup_cmd_per_lun, int, 0); static int setup_sg_tablesize = -1; -MODULE_PARM(setup_sg_tablesize, "i"); +module_param(setup_sg_tablesize, int, 0); #ifdef SUPPORT_TAGS static int setup_use_tagged_queuing = -1; -MODULE_PARM(setup_use_tagged_queuing, "i"); +module_param(setup_use_tagged_queuing, int, 0); #endif static int setup_hostid = -1; -MODULE_PARM(setup_hostid, "i"); +module_param(setup_hostid, int, 0); #if defined(CONFIG_TT_DMA_EMUL) diff --git a/drivers/video/pm3fb.c b/drivers/video/pm3fb.c index 0e78ddc8158..52c18a35fb4 100644 --- a/drivers/video/pm3fb.c +++ b/drivers/video/pm3fb.c @@ -3532,26 +3532,26 @@ int __init pm3fb_init(void) MODULE_AUTHOR("Romain Dolbeau"); MODULE_DESCRIPTION("Permedia3 framebuffer device driver"); static char *mode[PM3_MAX_BOARD]; -MODULE_PARM(mode,PM3_MAX_BOARD_MODULE_ARRAY_STRING); +module_param_array(mode, charp, NULL, 0); MODULE_PARM_DESC(mode,"video mode"); -MODULE_PARM(disable,PM3_MAX_BOARD_MODULE_ARRAY_SHORT); +module_param_array(disable, short, NULL, 0); MODULE_PARM_DESC(disable,"disable board"); static short off[PM3_MAX_BOARD]; -MODULE_PARM(off,PM3_MAX_BOARD_MODULE_ARRAY_SHORT); +module_param_array(off, short, NULL, 0); MODULE_PARM_DESC(off,"disable board"); static char *pciid[PM3_MAX_BOARD]; -MODULE_PARM(pciid,PM3_MAX_BOARD_MODULE_ARRAY_STRING); +module_param_array(pciid, charp, NULL, 0); MODULE_PARM_DESC(pciid,"board PCI Id"); -MODULE_PARM(noaccel,PM3_MAX_BOARD_MODULE_ARRAY_SHORT); +module_param_array(noaccel, short, NULL, 0); MODULE_PARM_DESC(noaccel,"disable accel"); static char *font[PM3_MAX_BOARD]; -MODULE_PARM(font,PM3_MAX_BOARD_MODULE_ARRAY_STRING); +module_param_array(font, charp, NULL, 0); MODULE_PARM_DESC(font,"choose font"); -MODULE_PARM(depth,PM3_MAX_BOARD_MODULE_ARRAY_SHORT); +module_param(depth, short, NULL, 0); MODULE_PARM_DESC(depth,"boot-time depth"); -MODULE_PARM(printtimings, "h"); +module_param(printtimings, short, NULL, 0); MODULE_PARM_DESC(printtimings, "print the memory timings of the card(s)"); -MODULE_PARM(forcesize, PM3_MAX_BOARD_MODULE_ARRAY_SHORT); +module_param(forcesize, short, NULL, 0); MODULE_PARM_DESC(forcesize, "force specified memory size"); /* MODULE_SUPPORTED_DEVICE("Permedia3 PCI boards") diff --git a/include/linux/module.h b/include/linux/module.h index 70bd843c71c..e144309836a 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -554,25 +554,6 @@ static inline void module_remove_driver(struct device_driver *driver) /* BELOW HERE ALL THESE ARE OBSOLETE AND WILL VANISH */ -struct obsolete_modparm { - char name[64]; - char type[64-sizeof(void *)]; - void *addr; -}; - -static inline void MODULE_PARM_(void) { } -#ifdef MODULE -/* DEPRECATED: Do not use. */ -#define MODULE_PARM(var,type) \ -extern struct obsolete_modparm __parm_##var \ -__attribute__((section("__obsparm"))); \ -struct obsolete_modparm __parm_##var = \ -{ __stringify(var), type, &MODULE_PARM_ }; \ -__MODULE_PARM_TYPE(var, type); -#else -#define MODULE_PARM(var,type) static void __attribute__((__unused__)) *__parm_##var = &MODULE_PARM_; -#endif - #define __MODULE_STRING(x) __stringify(x) /* Use symbol_get and symbol_put instead. You'll thank me. */ diff --git a/include/video/pm3fb.h b/include/video/pm3fb.h index 6f4ea808cf7..ac021379ac4 100644 --- a/include/video/pm3fb.h +++ b/include/video/pm3fb.h @@ -1128,10 +1128,7 @@ #endif /* max number of simultaneous board */ -/* warning : make sure module array def's are coherent with PM3_MAX_BOARD */ #define PM3_MAX_BOARD 4 -#define PM3_MAX_BOARD_MODULE_ARRAY_SHORT "1-4h" -#define PM3_MAX_BOARD_MODULE_ARRAY_STRING "1-4s" /* max size of options */ #define PM3_OPTIONS_SIZE 256 diff --git a/init/Kconfig b/init/Kconfig index 1d19fd25204..05951c1d654 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -470,15 +470,6 @@ config MODULE_FORCE_UNLOAD rmmod). This is mainly for kernel developers and desperate users. If unsure, say N. -config OBSOLETE_MODPARM - bool - default y - depends on MODULES - help - You need this option to use module parameters on modules which - have not been converted to the new module parameter system yet. - If unsure, say Y. - config MODVERSIONS bool "Module versioning support" depends on MODULES diff --git a/kernel/module.c b/kernel/module.c index 54623c714bb..ddfe45ac2fd 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -233,24 +233,6 @@ static unsigned long __find_symbol(const char *name, return 0; } -/* Find a symbol in this elf symbol table */ -static unsigned long find_local_symbol(Elf_Shdr *sechdrs, - unsigned int symindex, - const char *strtab, - const char *name) -{ - unsigned int i; - Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; - - /* Search (defined) internal symbols first. */ - for (i = 1; i < sechdrs[symindex].sh_size/sizeof(*sym); i++) { - if (sym[i].st_shndx != SHN_UNDEF - && strcmp(name, strtab + sym[i].st_name) == 0) - return sym[i].st_value; - } - return 0; -} - /* Search for module by name: must hold module_mutex. */ static struct module *find_module(const char *name) { @@ -785,139 +767,6 @@ static struct module_attribute *modinfo_attrs[] = { NULL, }; -#ifdef CONFIG_OBSOLETE_MODPARM -/* Bounds checking done below */ -static int obsparm_copy_string(const char *val, struct kernel_param *kp) -{ - strcpy(kp->arg, val); - return 0; -} - -static int set_obsolete(const char *val, struct kernel_param *kp) -{ - unsigned int min, max; - unsigned int size, maxsize; - int dummy; - char *endp; - const char *p; - struct obsolete_modparm *obsparm = kp->arg; - - if (!val) { - printk(KERN_ERR "Parameter %s needs an argument\n", kp->name); - return -EINVAL; - } - - /* type is: [min[-max]]{b,h,i,l,s} */ - p = obsparm->type; - min = simple_strtol(p, &endp, 10); - if (endp == obsparm->type) - min = max = 1; - else if (*endp == '-') { - p = endp+1; - max = simple_strtol(p, &endp, 10); - } else - max = min; - switch (*endp) { - case 'b': - return param_array(kp->name, val, min, max, obsparm->addr, - 1, param_set_byte, &dummy); - case 'h': - return param_array(kp->name, val, min, max, obsparm->addr, - sizeof(short), param_set_short, &dummy); - case 'i': - return param_array(kp->name, val, min, max, obsparm->addr, - sizeof(int), param_set_int, &dummy); - case 'l': - return param_array(kp->name, val, min, max, obsparm->addr, - sizeof(long), param_set_long, &dummy); - case 's': - return param_array(kp->name, val, min, max, obsparm->addr, - sizeof(char *), param_set_charp, &dummy); - - case 'c': - /* Undocumented: 1-5c50 means 1-5 strings of up to 49 chars, - and the decl is "char xxx[5][50];" */ - p = endp+1; - maxsize = simple_strtol(p, &endp, 10); - /* We check lengths here (yes, this is a hack). */ - p = val; - while (p[size = strcspn(p, ",")]) { - if (size >= maxsize) - goto oversize; - p += size+1; - } - if (size >= maxsize) - goto oversize; - return param_array(kp->name, val, min, max, obsparm->addr, - maxsize, obsparm_copy_string, &dummy); - } - printk(KERN_ERR "Unknown obsolete parameter type %s\n", obsparm->type); - return -EINVAL; - oversize: - printk(KERN_ERR - "Parameter %s doesn't fit in %u chars.\n", kp->name, maxsize); - return -EINVAL; -} - -static int obsolete_params(const char *name, - char *args, - struct obsolete_modparm obsparm[], - unsigned int num, - Elf_Shdr *sechdrs, - unsigned int symindex, - const char *strtab) -{ - struct kernel_param *kp; - unsigned int i; - int ret; - - kp = kmalloc(sizeof(kp[0]) * num, GFP_KERNEL); - if (!kp) - return -ENOMEM; - - for (i = 0; i < num; i++) { - char sym_name[128 + sizeof(MODULE_SYMBOL_PREFIX)]; - - snprintf(sym_name, sizeof(sym_name), "%s%s", - MODULE_SYMBOL_PREFIX, obsparm[i].name); - - kp[i].name = obsparm[i].name; - kp[i].perm = 000; - kp[i].set = set_obsolete; - kp[i].get = NULL; - obsparm[i].addr - = (void *)find_local_symbol(sechdrs, symindex, strtab, - sym_name); - if (!obsparm[i].addr) { - printk("%s: falsely claims to have parameter %s\n", - name, obsparm[i].name); - ret = -EINVAL; - goto out; - } - kp[i].arg = &obsparm[i]; - } - - ret = parse_args(name, args, kp, num, NULL); - out: - kfree(kp); - return ret; -} -#else -static int obsolete_params(const char *name, - char *args, - struct obsolete_modparm obsparm[], - unsigned int num, - Elf_Shdr *sechdrs, - unsigned int symindex, - const char *strtab) -{ - if (num != 0) - printk(KERN_WARNING "%s: Ignoring obsolete parameters\n", - name); - return 0; -} -#endif /* CONFIG_OBSOLETE_MODPARM */ - static const char vermagic[] = VERMAGIC_STRING; #ifdef CONFIG_MODVERSIONS @@ -1874,27 +1723,17 @@ static struct module *load_module(void __user *umod, set_fs(old_fs); mod->args = args; - if (obsparmindex) { - err = obsolete_params(mod->name, mod->args, - (struct obsolete_modparm *) - sechdrs[obsparmindex].sh_addr, - sechdrs[obsparmindex].sh_size - / sizeof(struct obsolete_modparm), - sechdrs, symindex, - (char *)sechdrs[strindex].sh_addr); - if (setupindex) - printk(KERN_WARNING "%s: Ignoring new-style " - "parameters in presence of obsolete ones\n", - mod->name); - } else { - /* Size of section 0 is 0, so this works well if no params */ - err = parse_args(mod->name, mod->args, - (struct kernel_param *) - sechdrs[setupindex].sh_addr, - sechdrs[setupindex].sh_size - / sizeof(struct kernel_param), - NULL); - } + if (obsparmindex) + printk(KERN_WARNING "%s: Ignoring obsolete parameters\n", + mod->name); + + /* Size of section 0 is 0, so this works well if no params */ + err = parse_args(mod->name, mod->args, + (struct kernel_param *) + sechdrs[setupindex].sh_addr, + sechdrs[setupindex].sh_size + / sizeof(struct kernel_param), + NULL); if (err < 0) goto arch_cleanup; diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c index 9a1fa8894b9..b4b362b5baf 100644 --- a/kernel/rcutorture.c +++ b/kernel/rcutorture.c @@ -54,15 +54,15 @@ static int verbose; /* Print more debug info. */ static int test_no_idle_hz; /* Test RCU's support for tickless idle CPUs. */ static int shuffle_interval = 5; /* Interval between shuffles (in sec)*/ -MODULE_PARM(nreaders, "i"); +module_param(nreaders, int, 0); MODULE_PARM_DESC(nreaders, "Number of RCU reader threads"); -MODULE_PARM(stat_interval, "i"); +module_param(stat_interval, int, 0); MODULE_PARM_DESC(stat_interval, "Number of seconds between stats printk()s"); -MODULE_PARM(verbose, "i"); +module_param(verbose, bool, 0); MODULE_PARM_DESC(verbose, "Enable verbose debugging printk()s"); -MODULE_PARM(test_no_idle_hz, "i"); +module_param(test_no_idle_hz, bool, 0); MODULE_PARM_DESC(test_no_idle_hz, "Test support for tickless idle CPUs"); -MODULE_PARM(shuffle_interval, "i"); +module_param(shuffle_interval, int, 0); MODULE_PARM_DESC(shuffle_interval, "Number of seconds between shuffles"); #define TORTURE_FLAG "rcutorture: " #define PRINTK_STRING(s) \ diff --git a/sound/oss/au1000.c b/sound/oss/au1000.c index fe54de25aaf..eacb0aef21e 100644 --- a/sound/oss/au1000.c +++ b/sound/oss/au1000.c @@ -100,7 +100,7 @@ /* Boot options */ static int vra = 0; // 0 = no VRA, 1 = use VRA if codec supports it -MODULE_PARM(vra, "i"); +module_param(vra, bool, 0); MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it"); diff --git a/sound/oss/au1550_ac97.c b/sound/oss/au1550_ac97.c index 6a4956b8025..c1168fae6be 100644 --- a/sound/oss/au1550_ac97.c +++ b/sound/oss/au1550_ac97.c @@ -79,7 +79,7 @@ * 0 = no VRA, 1 = use VRA if codec supports it */ static int vra = 1; -MODULE_PARM(vra, "i"); +module_param(vra, bool, 0); MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it"); static struct au1550_state { diff --git a/sound/oss/dmasound/dmasound_core.c b/sound/oss/dmasound/dmasound_core.c index c9302a1e515..87bd3100aef 100644 --- a/sound/oss/dmasound/dmasound_core.c +++ b/sound/oss/dmasound/dmasound_core.c @@ -195,18 +195,18 @@ */ int dmasound_catchRadius = 0; -MODULE_PARM(dmasound_catchRadius, "i"); +module_param(dmasound_catchRadius, int, 0); static unsigned int numWriteBufs = DEFAULT_N_BUFFERS; -MODULE_PARM(numWriteBufs, "i"); +module_param(numWriteBufs, int, 0); static unsigned int writeBufSize = DEFAULT_BUFF_SIZE ; /* in bytes */ -MODULE_PARM(writeBufSize, "i"); +module_param(writeBufSize, int, 0); #ifdef HAS_RECORD static unsigned int numReadBufs = DEFAULT_N_BUFFERS; -MODULE_PARM(numReadBufs, "i"); +module_param(numReadBufs, int, 0); static unsigned int readBufSize = DEFAULT_BUFF_SIZE; /* in bytes */ -MODULE_PARM(readBufSize, "i"); +module_param(readBufSize, int, 0); #endif MODULE_LICENSE("GPL"); diff --git a/sound/oss/ite8172.c b/sound/oss/ite8172.c index ffcb910f5c3..00ac1c95a42 100644 --- a/sound/oss/ite8172.c +++ b/sound/oss/ite8172.c @@ -1968,9 +1968,9 @@ static int i2s_fmt[NR_DEVICE]; static unsigned int devindex; -MODULE_PARM(spdif, "1-" __MODULE_STRING(NR_DEVICE) "i"); +module_param_array(spdif, int, NULL, 0); MODULE_PARM_DESC(spdif, "if 1 the S/PDIF digital output is enabled"); -MODULE_PARM(i2s_fmt, "1-" __MODULE_STRING(NR_DEVICE) "i"); +module_param_array(i2s_fmt, int, NULL, 0); MODULE_PARM_DESC(i2s_fmt, "the format of I2S"); MODULE_AUTHOR("Monta Vista Software, stevel@mvista.com"); diff --git a/sound/oss/swarm_cs4297a.c b/sound/oss/swarm_cs4297a.c index dce9016cbcf..eb5ea32fd1b 100644 --- a/sound/oss/swarm_cs4297a.c +++ b/sound/oss/swarm_cs4297a.c @@ -154,8 +154,8 @@ static void start_adc(struct cs4297a_state *s); #if CSDEBUG static unsigned long cs_debuglevel = 4; // levels range from 1-9 static unsigned long cs_debugmask = CS_INIT /*| CS_IOCTL*/; -MODULE_PARM(cs_debuglevel, "i"); -MODULE_PARM(cs_debugmask, "i"); +module_param(cs_debuglevel, int, 0); +module_param(cs_debugmask, int, 0); #endif #define CS_TRUE 1 #define CS_FALSE 0 diff --git a/sound/oss/waveartist.c b/sound/oss/waveartist.c index 99d04ad3ca1..afcb524a40e 100644 --- a/sound/oss/waveartist.c +++ b/sound/oss/waveartist.c @@ -2028,8 +2028,8 @@ __setup("waveartist=", setup_waveartist); #endif MODULE_DESCRIPTION("Rockwell WaveArtist RWA-010 sound driver"); -MODULE_PARM(io, "i"); /* IO base */ -MODULE_PARM(irq, "i"); /* IRQ */ -MODULE_PARM(dma, "i"); /* DMA */ -MODULE_PARM(dma2, "i"); /* DMA2 */ +module_param(io, int, 0); /* IO base */ +module_param(irq, int, 0); /* IRQ */ +module_param(dma, int, 0); /* DMA */ +module_param(dma2, int, 0); /* DMA2 */ MODULE_LICENSE("GPL"); -- cgit v1.2.3-70-g09d2 From e041c683412d5bf44dc2b109053e3b837b71742d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Mon, 27 Mar 2006 01:16:30 -0800 Subject: [PATCH] Notifier chain update: API changes The kernel's implementation of notifier chains is unsafe. There is no protection against entries being added to or removed from a chain while the chain is in use. The issues were discussed in this thread: http://marc.theaimsgroup.com/?l=linux-kernel&m=113018709002036&w=2 We noticed that notifier chains in the kernel fall into two basic usage classes: "Blocking" chains are always called from a process context and the callout routines are allowed to sleep; "Atomic" chains can be called from an atomic context and the callout routines are not allowed to sleep. We decided to codify this distinction and make it part of the API. Therefore this set of patches introduces three new, parallel APIs: one for blocking notifiers, one for atomic notifiers, and one for "raw" notifiers (which is really just the old API under a new name). New kinds of data structures are used for the heads of the chains, and new routines are defined for registration, unregistration, and calling a chain. The three APIs are explained in include/linux/notifier.h and their implementation is in kernel/sys.c. With atomic and blocking chains, the implementation guarantees that the chain links will not be corrupted and that chain callers will not get messed up by entries being added or removed. For raw chains the implementation provides no guarantees at all; users of this API must provide their own protections. (The idea was that situations may come up where the assumptions of the atomic and blocking APIs are not appropriate, so it should be possible for users to handle these things in their own way.) There are some limitations, which should not be too hard to live with. For atomic/blocking chains, registration and unregistration must always be done in a process context since the chain is protected by a mutex/rwsem. Also, a callout routine for a non-raw chain must not try to register or unregister entries on its own chain. (This did happen in a couple of places and the code had to be changed to avoid it.) Since atomic chains may be called from within an NMI handler, they cannot use spinlocks for synchronization. Instead we use RCU. The overhead falls almost entirely in the unregister routine, which is okay since unregistration is much less frequent that calling a chain. Here is the list of chains that we adjusted and their classifications. None of them use the raw API, so for the moment it is only a placeholder. ATOMIC CHAINS ------------- arch/i386/kernel/traps.c: i386die_chain arch/ia64/kernel/traps.c: ia64die_chain arch/powerpc/kernel/traps.c: powerpc_die_chain arch/sparc64/kernel/traps.c: sparc64die_chain arch/x86_64/kernel/traps.c: die_chain drivers/char/ipmi/ipmi_si_intf.c: xaction_notifier_list kernel/panic.c: panic_notifier_list kernel/profile.c: task_free_notifier net/bluetooth/hci_core.c: hci_notifier net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_chain net/ipv4/netfilter/ip_conntrack_core.c: ip_conntrack_expect_chain net/ipv6/addrconf.c: inet6addr_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_chain net/netfilter/nf_conntrack_core.c: nf_conntrack_expect_chain net/netlink/af_netlink.c: netlink_chain BLOCKING CHAINS --------------- arch/powerpc/platforms/pseries/reconfig.c: pSeries_reconfig_chain arch/s390/kernel/process.c: idle_chain arch/x86_64/kernel/process.c idle_notifier drivers/base/memory.c: memory_chain drivers/cpufreq/cpufreq.c cpufreq_policy_notifier_list drivers/cpufreq/cpufreq.c cpufreq_transition_notifier_list drivers/macintosh/adb.c: adb_client_list drivers/macintosh/via-pmu.c sleep_notifier_list drivers/macintosh/via-pmu68k.c sleep_notifier_list drivers/macintosh/windfarm_core.c wf_client_list drivers/usb/core/notify.c usb_notifier_list drivers/video/fbmem.c fb_notifier_list kernel/cpu.c cpu_chain kernel/module.c module_notify_list kernel/profile.c munmap_notifier kernel/profile.c task_exit_notifier kernel/sys.c reboot_notifier_list net/core/dev.c netdev_chain net/decnet/dn_dev.c: dnaddr_chain net/ipv4/devinet.c: inetaddr_chain It's possible that some of these classifications are wrong. If they are, please let us know or submit a patch to fix them. Note that any chain that gets called very frequently should be atomic, because the rwsem read-locking used for blocking chains is very likely to incur cache misses on SMP systems. (However, if the chain's callout routines may sleep then the chain cannot be atomic.) The patch set was written by Alan Stern and Chandra Seetharaman, incorporating material written by Keith Owens and suggestions from Paul McKenney and Andrew Morton. [jes@sgi.com: restructure the notifier chain initialization macros] Signed-off-by: Alan Stern Signed-off-by: Chandra Seetharaman Signed-off-by: Jes Sorensen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/alpha/kernel/setup.c | 5 +- arch/arm/mach-omap1/board-netstar.c | 2 +- arch/arm/mach-omap1/board-voiceblue.c | 2 +- arch/i386/kernel/traps.c | 17 +- arch/ia64/kernel/traps.c | 6 +- arch/mips/lasat/setup.c | 3 +- arch/mips/sgi-ip22/ip22-reset.c | 2 +- arch/mips/sgi-ip32/ip32-reset.c | 2 +- arch/parisc/kernel/pdc_chassis.c | 3 +- arch/powerpc/kernel/setup_64.c | 3 +- arch/powerpc/kernel/traps.c | 16 +- arch/powerpc/platforms/pseries/reconfig.c | 10 +- arch/ppc/platforms/prep_setup.c | 2 +- arch/s390/kernel/process.c | 11 +- arch/sparc64/kernel/traps.c | 17 +- arch/um/drivers/mconsole_kern.c | 3 +- arch/um/kernel/um_arch.c | 3 +- arch/x86_64/kernel/process.c | 17 +- arch/x86_64/kernel/traps.c | 18 +- arch/xtensa/platform-iss/setup.c | 2 +- drivers/base/memory.c | 8 +- drivers/char/ipmi/ipmi_msghandler.c | 4 +- drivers/char/ipmi/ipmi_si_intf.c | 7 +- drivers/char/ipmi/ipmi_watchdog.c | 6 +- drivers/cpufreq/cpufreq.c | 61 +++--- drivers/firmware/dcdbas.c | 19 +- drivers/macintosh/adb.c | 11 +- drivers/macintosh/adbhid.c | 3 +- drivers/macintosh/via-pmu.c | 2 +- drivers/macintosh/via-pmu68k.c | 7 +- drivers/macintosh/windfarm_core.c | 8 +- drivers/misc/ibmasm/heartbeat.c | 5 +- drivers/net/bonding/bond_main.c | 2 +- drivers/parisc/led.c | 14 +- drivers/parisc/power.c | 6 +- drivers/scsi/gdth.c | 9 +- drivers/usb/core/notify.c | 65 +----- drivers/video/fbmem.c | 31 +-- include/asm-i386/kdebug.h | 10 +- include/asm-ia64/kdebug.h | 4 +- include/asm-powerpc/kdebug.h | 12 +- include/asm-sparc64/kdebug.h | 11 +- include/asm-x86_64/kdebug.h | 23 +- include/linux/adb.h | 2 +- include/linux/kernel.h | 2 +- include/linux/memory.h | 1 - include/linux/netfilter_ipv4/ip_conntrack.h | 17 +- include/linux/notifier.h | 96 +++++++- include/net/netfilter/nf_conntrack.h | 17 +- kernel/cpu.c | 29 +-- kernel/module.c | 20 +- kernel/panic.c | 4 +- kernel/profile.c | 53 ++--- kernel/softlockup.c | 2 +- kernel/sys.c | 327 ++++++++++++++++++++++------ net/bluetooth/hci_core.c | 8 +- net/core/dev.c | 42 ++-- net/decnet/dn_dev.c | 10 +- net/ipv4/devinet.c | 16 +- net/ipv4/netfilter/ip_conntrack_core.c | 6 +- net/ipv6/addrconf.c | 10 +- net/netfilter/nf_conntrack_core.c | 6 +- net/netlink/af_netlink.c | 9 +- 63 files changed, 677 insertions(+), 472 deletions(-) (limited to 'kernel/module.c') diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c index 9402624453c..dd876967059 100644 --- a/arch/alpha/kernel/setup.c +++ b/arch/alpha/kernel/setup.c @@ -43,7 +43,7 @@ #include #include -extern struct notifier_block *panic_notifier_list; +extern struct atomic_notifier_head panic_notifier_list; static int alpha_panic_event(struct notifier_block *, unsigned long, void *); static struct notifier_block alpha_panic_block = { alpha_panic_event, @@ -500,7 +500,8 @@ setup_arch(char **cmdline_p) } /* Register a call for panic conditions. */ - notifier_chain_register(&panic_notifier_list, &alpha_panic_block); + atomic_notifier_chain_register(&panic_notifier_list, + &alpha_panic_block); #ifdef CONFIG_ALPHA_GENERIC /* Assume that we've booted from SRM if we haven't booted from MILO. diff --git a/arch/arm/mach-omap1/board-netstar.c b/arch/arm/mach-omap1/board-netstar.c index 60d5f8a3339..7520e602d7a 100644 --- a/arch/arm/mach-omap1/board-netstar.c +++ b/arch/arm/mach-omap1/board-netstar.c @@ -141,7 +141,7 @@ static int __init netstar_late_init(void) /* TODO: Setup front panel switch here */ /* Setup panic notifier */ - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); return 0; } diff --git a/arch/arm/mach-omap1/board-voiceblue.c b/arch/arm/mach-omap1/board-voiceblue.c index bfd5fdd1a87..52e4a9d6964 100644 --- a/arch/arm/mach-omap1/board-voiceblue.c +++ b/arch/arm/mach-omap1/board-voiceblue.c @@ -235,7 +235,7 @@ static struct notifier_block panic_block = { static int __init voiceblue_setup(void) { /* Setup panic notifier */ - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); return 0; } diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c index 4624f8ca245..6b63a5aa1e4 100644 --- a/arch/i386/kernel/traps.c +++ b/arch/i386/kernel/traps.c @@ -92,22 +92,21 @@ asmlinkage void spurious_interrupt_bug(void); asmlinkage void machine_check(void); static int kstack_depth_to_print = 24; -struct notifier_block *i386die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); +ATOMIC_NOTIFIER_HEAD(i386die_chain); int register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; - vmalloc_sync_all(); - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&i386die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; + return atomic_notifier_chain_register(&i386die_chain, nb); } EXPORT_SYMBOL(register_die_notifier); +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&i386die_chain, nb); +} +EXPORT_SYMBOL(unregister_die_notifier); + static inline int valid_stack_ptr(struct thread_info *tinfo, void *p) { return p > (void *)tinfo && diff --git a/arch/ia64/kernel/traps.c b/arch/ia64/kernel/traps.c index dabd6c32641..7c1ddc8ac44 100644 --- a/arch/ia64/kernel/traps.c +++ b/arch/ia64/kernel/traps.c @@ -30,19 +30,19 @@ extern spinlock_t timerlist_lock; fpswa_interface_t *fpswa_interface; EXPORT_SYMBOL(fpswa_interface); -struct notifier_block *ia64die_chain; +ATOMIC_NOTIFIER_HEAD(ia64die_chain); int register_die_notifier(struct notifier_block *nb) { - return notifier_chain_register(&ia64die_chain, nb); + return atomic_notifier_chain_register(&ia64die_chain, nb); } EXPORT_SYMBOL_GPL(register_die_notifier); int unregister_die_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&ia64die_chain, nb); + return atomic_notifier_chain_unregister(&ia64die_chain, nb); } EXPORT_SYMBOL_GPL(unregister_die_notifier); diff --git a/arch/mips/lasat/setup.c b/arch/mips/lasat/setup.c index 83eb08b7a07..e9e9a89c674 100644 --- a/arch/mips/lasat/setup.c +++ b/arch/mips/lasat/setup.c @@ -165,7 +165,8 @@ void __init plat_setup(void) /* Set up panic notifier */ for (i = 0; i < sizeof(lasat_panic_block) / sizeof(struct notifier_block); i++) - notifier_chain_register(&panic_notifier_list, &lasat_panic_block[i]); + atomic_notifier_chain_register(&panic_notifier_list, + &lasat_panic_block[i]); lasat_reboot_setup(); diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c index 92a3b3c15ed..a9c58e067b5 100644 --- a/arch/mips/sgi-ip22/ip22-reset.c +++ b/arch/mips/sgi-ip22/ip22-reset.c @@ -238,7 +238,7 @@ static int __init reboot_setup(void) request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL); init_timer(&blink_timer); blink_timer.function = blink_timeout; - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); return 0; } diff --git a/arch/mips/sgi-ip32/ip32-reset.c b/arch/mips/sgi-ip32/ip32-reset.c index 0c948008b02..ab9d9cef089 100644 --- a/arch/mips/sgi-ip32/ip32-reset.c +++ b/arch/mips/sgi-ip32/ip32-reset.c @@ -193,7 +193,7 @@ static __init int ip32_reboot_setup(void) init_timer(&blink_timer); blink_timer.function = blink_timeout; - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); request_irq(MACEISA_RTC_IRQ, ip32_rtc_int, 0, "rtc", NULL); diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c index 2a01fe1bdc9..0cea6958f42 100644 --- a/arch/parisc/kernel/pdc_chassis.c +++ b/arch/parisc/kernel/pdc_chassis.c @@ -150,7 +150,8 @@ void __init parisc_pdc_chassis_init(void) if (handle) { /* initialize panic notifier chain */ - notifier_chain_register(&panic_notifier_list, &pdc_chassis_panic_block); + atomic_notifier_chain_register(&panic_notifier_list, + &pdc_chassis_panic_block); /* initialize reboot notifier chain */ register_reboot_notifier(&pdc_chassis_reboot_block); diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 2f3fdad3559..e20c1fae342 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -579,7 +579,8 @@ void __init setup_arch(char **cmdline_p) panic_timeout = 180; if (ppc_md.panic) - notifier_chain_register(&panic_notifier_list, &ppc64_panic_block); + atomic_notifier_chain_register(&panic_notifier_list, + &ppc64_panic_block); init_mm.start_code = PAGE_OFFSET; init_mm.end_code = (unsigned long) _etext; diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 98660aedeeb..9763faab673 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -74,19 +74,19 @@ EXPORT_SYMBOL(__debugger_dabr_match); EXPORT_SYMBOL(__debugger_fault_handler); #endif -struct notifier_block *powerpc_die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); +ATOMIC_NOTIFIER_HEAD(powerpc_die_chain); int register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; + return atomic_notifier_chain_register(&powerpc_die_chain, nb); +} +EXPORT_SYMBOL(register_die_notifier); - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&powerpc_die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&powerpc_die_chain, nb); } +EXPORT_SYMBOL(unregister_die_notifier); /* * Trap & Exception support diff --git a/arch/powerpc/platforms/pseries/reconfig.c b/arch/powerpc/platforms/pseries/reconfig.c index 86cfa6ecdcf..5ad90676567 100644 --- a/arch/powerpc/platforms/pseries/reconfig.c +++ b/arch/powerpc/platforms/pseries/reconfig.c @@ -94,16 +94,16 @@ static struct device_node *derive_parent(const char *path) return parent; } -static struct notifier_block *pSeries_reconfig_chain; +static BLOCKING_NOTIFIER_HEAD(pSeries_reconfig_chain); int pSeries_reconfig_notifier_register(struct notifier_block *nb) { - return notifier_chain_register(&pSeries_reconfig_chain, nb); + return blocking_notifier_chain_register(&pSeries_reconfig_chain, nb); } void pSeries_reconfig_notifier_unregister(struct notifier_block *nb) { - notifier_chain_unregister(&pSeries_reconfig_chain, nb); + blocking_notifier_chain_unregister(&pSeries_reconfig_chain, nb); } static int pSeries_reconfig_add_node(const char *path, struct property *proplist) @@ -131,7 +131,7 @@ static int pSeries_reconfig_add_node(const char *path, struct property *proplist goto out_err; } - err = notifier_call_chain(&pSeries_reconfig_chain, + err = blocking_notifier_call_chain(&pSeries_reconfig_chain, PSERIES_RECONFIG_ADD, np); if (err == NOTIFY_BAD) { printk(KERN_ERR "Failed to add device node %s\n", path); @@ -171,7 +171,7 @@ static int pSeries_reconfig_remove_node(struct device_node *np) remove_node_proc_entries(np); - notifier_call_chain(&pSeries_reconfig_chain, + blocking_notifier_call_chain(&pSeries_reconfig_chain, PSERIES_RECONFIG_REMOVE, np); of_detach_node(np); diff --git a/arch/ppc/platforms/prep_setup.c b/arch/ppc/platforms/prep_setup.c index a0fc628ffb1..d95c05d9824 100644 --- a/arch/ppc/platforms/prep_setup.c +++ b/arch/ppc/platforms/prep_setup.c @@ -736,7 +736,7 @@ ibm_statusled_progress(char *s, unsigned short hex) hex = 0xfff; if (!notifier_installed) { ++notifier_installed; - notifier_chain_register(&panic_notifier_list, + atomic_notifier_chain_register(&panic_notifier_list, &ibm_statusled_block); } } diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 99182a415fe..4a0f5a1551e 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -76,17 +76,17 @@ unsigned long thread_saved_pc(struct task_struct *tsk) /* * Need to know about CPUs going idle? */ -static struct notifier_block *idle_chain; +static ATOMIC_NOTIFIER_HEAD(idle_chain); int register_idle_notifier(struct notifier_block *nb) { - return notifier_chain_register(&idle_chain, nb); + return atomic_notifier_chain_register(&idle_chain, nb); } EXPORT_SYMBOL(register_idle_notifier); int unregister_idle_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&idle_chain, nb); + return atomic_notifier_chain_unregister(&idle_chain, nb); } EXPORT_SYMBOL(unregister_idle_notifier); @@ -95,7 +95,7 @@ void do_monitor_call(struct pt_regs *regs, long interruption_code) /* disable monitor call class 0 */ __ctl_clear_bit(8, 15); - notifier_call_chain(&idle_chain, CPU_NOT_IDLE, + atomic_notifier_call_chain(&idle_chain, CPU_NOT_IDLE, (void *)(long) smp_processor_id()); } @@ -116,7 +116,8 @@ static void default_idle(void) return; } - rc = notifier_call_chain(&idle_chain, CPU_IDLE, (void *)(long) cpu); + rc = atomic_notifier_call_chain(&idle_chain, + CPU_IDLE, (void *)(long) cpu); if (rc != NOTIFY_OK && rc != NOTIFY_DONE) BUG(); if (rc != NOTIFY_OK) { diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c index df612e4f75f..ff090bb9734 100644 --- a/arch/sparc64/kernel/traps.c +++ b/arch/sparc64/kernel/traps.c @@ -43,18 +43,19 @@ #include #endif -struct notifier_block *sparc64die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); +ATOMIC_NOTIFIER_HEAD(sparc64die_chain); int register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&sparc64die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; + return atomic_notifier_chain_register(&sparc64die_chain, nb); } +EXPORT_SYMBOL(register_die_notifier); + +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&sparc64die_chain, nb); +} +EXPORT_SYMBOL(unregister_die_notifier); /* When an irrecoverable trap occurs at tl > 0, the trap entry * code logs the trap state registers at every level in the trap diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index 54388d10bcf..1488816588e 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -762,7 +762,8 @@ static struct notifier_block panic_exit_notifier = { static int add_notifier(void) { - notifier_chain_register(&panic_notifier_list, &panic_exit_notifier); + atomic_notifier_chain_register(&panic_notifier_list, + &panic_exit_notifier); return(0); } diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index bb1c87211ac..7d51dd7201c 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -477,7 +477,8 @@ static struct notifier_block panic_exit_notifier = { void __init setup_arch(char **cmdline_p) { - notifier_chain_register(&panic_notifier_list, &panic_exit_notifier); + atomic_notifier_chain_register(&panic_notifier_list, + &panic_exit_notifier); paging_init(); strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); *cmdline_p = command_line; diff --git a/arch/x86_64/kernel/process.c b/arch/x86_64/kernel/process.c index 0370720515f..70dd8e5c688 100644 --- a/arch/x86_64/kernel/process.c +++ b/arch/x86_64/kernel/process.c @@ -66,24 +66,17 @@ EXPORT_SYMBOL(boot_option_idle_override); void (*pm_idle)(void); static DEFINE_PER_CPU(unsigned int, cpu_idle_state); -static struct notifier_block *idle_notifier; -static DEFINE_SPINLOCK(idle_notifier_lock); +static ATOMIC_NOTIFIER_HEAD(idle_notifier); void idle_notifier_register(struct notifier_block *n) { - unsigned long flags; - spin_lock_irqsave(&idle_notifier_lock, flags); - notifier_chain_register(&idle_notifier, n); - spin_unlock_irqrestore(&idle_notifier_lock, flags); + atomic_notifier_chain_register(&idle_notifier, n); } EXPORT_SYMBOL_GPL(idle_notifier_register); void idle_notifier_unregister(struct notifier_block *n) { - unsigned long flags; - spin_lock_irqsave(&idle_notifier_lock, flags); - notifier_chain_unregister(&idle_notifier, n); - spin_unlock_irqrestore(&idle_notifier_lock, flags); + atomic_notifier_chain_unregister(&idle_notifier, n); } EXPORT_SYMBOL(idle_notifier_unregister); @@ -93,13 +86,13 @@ static DEFINE_PER_CPU(enum idle_state, idle_state) = CPU_NOT_IDLE; void enter_idle(void) { __get_cpu_var(idle_state) = CPU_IDLE; - notifier_call_chain(&idle_notifier, IDLE_START, NULL); + atomic_notifier_call_chain(&idle_notifier, IDLE_START, NULL); } static void __exit_idle(void) { __get_cpu_var(idle_state) = CPU_NOT_IDLE; - notifier_call_chain(&idle_notifier, IDLE_END, NULL); + atomic_notifier_call_chain(&idle_notifier, IDLE_END, NULL); } /* Called from interrupts to signify idle end */ diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index 7b148309c52..edaa9fe654d 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -69,20 +69,20 @@ asmlinkage void alignment_check(void); asmlinkage void machine_check(void); asmlinkage void spurious_interrupt_bug(void); -struct notifier_block *die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); +ATOMIC_NOTIFIER_HEAD(die_chain); int register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; - vmalloc_sync_all(); - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; + return atomic_notifier_chain_register(&die_chain, nb); +} +EXPORT_SYMBOL(register_die_notifier); + +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&die_chain, nb); } +EXPORT_SYMBOL(unregister_die_notifier); static inline void conditional_sti(struct pt_regs *regs) { diff --git a/arch/xtensa/platform-iss/setup.c b/arch/xtensa/platform-iss/setup.c index 2e6dcbf0cc0..23790a5610e 100644 --- a/arch/xtensa/platform-iss/setup.c +++ b/arch/xtensa/platform-iss/setup.c @@ -108,5 +108,5 @@ static struct notifier_block iss_panic_block = { void __init platform_setup(char **p_cmdline) { - notifier_chain_register(&panic_notifier_list, &iss_panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block); } diff --git a/drivers/base/memory.c b/drivers/base/memory.c index 105a0d61eb1..dd547af4681 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -47,16 +47,16 @@ static struct kset_uevent_ops memory_uevent_ops = { .uevent = memory_uevent, }; -static struct notifier_block *memory_chain; +static BLOCKING_NOTIFIER_HEAD(memory_chain); int register_memory_notifier(struct notifier_block *nb) { - return notifier_chain_register(&memory_chain, nb); + return blocking_notifier_chain_register(&memory_chain, nb); } void unregister_memory_notifier(struct notifier_block *nb) { - notifier_chain_unregister(&memory_chain, nb); + blocking_notifier_chain_unregister(&memory_chain, nb); } /* @@ -140,7 +140,7 @@ static ssize_t show_mem_state(struct sys_device *dev, char *buf) static inline int memory_notify(unsigned long val, void *v) { - return notifier_call_chain(&memory_chain, val, v); + return blocking_notifier_call_chain(&memory_chain, val, v); } /* diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c index b8fb87c6c29..40eb005b9d7 100644 --- a/drivers/char/ipmi/ipmi_msghandler.c +++ b/drivers/char/ipmi/ipmi_msghandler.c @@ -3744,7 +3744,7 @@ static int ipmi_init_msghandler(void) ipmi_timer.expires = jiffies + IPMI_TIMEOUT_JIFFIES; add_timer(&ipmi_timer); - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); initialized = 1; @@ -3764,7 +3764,7 @@ static __exit void cleanup_ipmi(void) if (!initialized) return; - notifier_chain_unregister(&panic_notifier_list, &panic_block); + atomic_notifier_chain_unregister(&panic_notifier_list, &panic_block); /* This can't be called if any interfaces exist, so no worry about shutting down the interfaces. */ diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 12f858dc999..35fbd4d8ed4 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -237,10 +237,10 @@ struct smi_info static int try_smi_init(struct smi_info *smi); -static struct notifier_block *xaction_notifier_list; +static ATOMIC_NOTIFIER_HEAD(xaction_notifier_list); static int register_xaction_notifier(struct notifier_block * nb) { - return notifier_chain_register(&xaction_notifier_list, nb); + return atomic_notifier_chain_register(&xaction_notifier_list, nb); } static void si_restart_short_timer(struct smi_info *smi_info); @@ -302,7 +302,8 @@ static enum si_sm_result start_next_msg(struct smi_info *smi_info) do_gettimeofday(&t); printk("**Start2: %d.%9.9d\n", t.tv_sec, t.tv_usec); #endif - err = notifier_call_chain(&xaction_notifier_list, 0, smi_info); + err = atomic_notifier_call_chain(&xaction_notifier_list, + 0, smi_info); if (err & NOTIFY_STOP_MASK) { rv = SI_SM_CALL_WITHOUT_DELAY; goto out; diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c index 616539310d9..7ece9f3c8f7 100644 --- a/drivers/char/ipmi/ipmi_watchdog.c +++ b/drivers/char/ipmi/ipmi_watchdog.c @@ -1158,7 +1158,8 @@ static int __init ipmi_wdog_init(void) } register_reboot_notifier(&wdog_reboot_notifier); - notifier_chain_register(&panic_notifier_list, &wdog_panic_notifier); + atomic_notifier_chain_register(&panic_notifier_list, + &wdog_panic_notifier); printk(KERN_INFO PFX "driver initialized\n"); @@ -1176,7 +1177,8 @@ static __exit void ipmi_unregister_watchdog(void) release_nmi(&ipmi_nmi_handler); #endif - notifier_chain_unregister(&panic_notifier_list, &wdog_panic_notifier); + atomic_notifier_chain_unregister(&panic_notifier_list, + &wdog_panic_notifier); unregister_reboot_notifier(&wdog_reboot_notifier); if (! watchdog_user) diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index aed80e6aec6..9b6ae7dc8b8 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -52,9 +52,8 @@ static void handle_update(void *data); * changes to devices when the CPU clock speed changes. * The mutex locks both lists. */ -static struct notifier_block *cpufreq_policy_notifier_list; -static struct notifier_block *cpufreq_transition_notifier_list; -static DECLARE_RWSEM (cpufreq_notifier_rwsem); +static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list); +static BLOCKING_NOTIFIER_HEAD(cpufreq_transition_notifier_list); static LIST_HEAD(cpufreq_governor_list); @@ -247,8 +246,6 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state) dprintk("notification %u of frequency transition to %u kHz\n", state, freqs->new); - down_read(&cpufreq_notifier_rwsem); - policy = cpufreq_cpu_data[freqs->cpu]; switch (state) { @@ -266,20 +263,19 @@ void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state) freqs->old = policy->cur; } } - notifier_call_chain(&cpufreq_transition_notifier_list, - CPUFREQ_PRECHANGE, freqs); + blocking_notifier_call_chain(&cpufreq_transition_notifier_list, + CPUFREQ_PRECHANGE, freqs); adjust_jiffies(CPUFREQ_PRECHANGE, freqs); break; case CPUFREQ_POSTCHANGE: adjust_jiffies(CPUFREQ_POSTCHANGE, freqs); - notifier_call_chain(&cpufreq_transition_notifier_list, - CPUFREQ_POSTCHANGE, freqs); + blocking_notifier_call_chain(&cpufreq_transition_notifier_list, + CPUFREQ_POSTCHANGE, freqs); if (likely(policy) && likely(policy->cpu == freqs->cpu)) policy->cur = freqs->new; break; } - up_read(&cpufreq_notifier_rwsem); } EXPORT_SYMBOL_GPL(cpufreq_notify_transition); @@ -1007,7 +1003,7 @@ static int cpufreq_suspend(struct sys_device * sysdev, pm_message_t pmsg) freqs.old = cpu_policy->cur; freqs.new = cur_freq; - notifier_call_chain(&cpufreq_transition_notifier_list, + blocking_notifier_call_chain(&cpufreq_transition_notifier_list, CPUFREQ_SUSPENDCHANGE, &freqs); adjust_jiffies(CPUFREQ_SUSPENDCHANGE, &freqs); @@ -1088,7 +1084,8 @@ static int cpufreq_resume(struct sys_device * sysdev) freqs.old = cpu_policy->cur; freqs.new = cur_freq; - notifier_call_chain(&cpufreq_transition_notifier_list, + blocking_notifier_call_chain( + &cpufreq_transition_notifier_list, CPUFREQ_RESUMECHANGE, &freqs); adjust_jiffies(CPUFREQ_RESUMECHANGE, &freqs); @@ -1125,24 +1122,24 @@ static struct sysdev_driver cpufreq_sysdev_driver = { * changes in cpufreq policy. * * This function may sleep, and has the same return conditions as - * notifier_chain_register. + * blocking_notifier_chain_register. */ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list) { int ret; - down_write(&cpufreq_notifier_rwsem); switch (list) { case CPUFREQ_TRANSITION_NOTIFIER: - ret = notifier_chain_register(&cpufreq_transition_notifier_list, nb); + ret = blocking_notifier_chain_register( + &cpufreq_transition_notifier_list, nb); break; case CPUFREQ_POLICY_NOTIFIER: - ret = notifier_chain_register(&cpufreq_policy_notifier_list, nb); + ret = blocking_notifier_chain_register( + &cpufreq_policy_notifier_list, nb); break; default: ret = -EINVAL; } - up_write(&cpufreq_notifier_rwsem); return ret; } @@ -1157,24 +1154,24 @@ EXPORT_SYMBOL(cpufreq_register_notifier); * Remove a driver from the CPU frequency notifier list. * * This function may sleep, and has the same return conditions as - * notifier_chain_unregister. + * blocking_notifier_chain_unregister. */ int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list) { int ret; - down_write(&cpufreq_notifier_rwsem); switch (list) { case CPUFREQ_TRANSITION_NOTIFIER: - ret = notifier_chain_unregister(&cpufreq_transition_notifier_list, nb); + ret = blocking_notifier_chain_unregister( + &cpufreq_transition_notifier_list, nb); break; case CPUFREQ_POLICY_NOTIFIER: - ret = notifier_chain_unregister(&cpufreq_policy_notifier_list, nb); + ret = blocking_notifier_chain_unregister( + &cpufreq_policy_notifier_list, nb); break; default: ret = -EINVAL; } - up_write(&cpufreq_notifier_rwsem); return ret; } @@ -1346,29 +1343,23 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data, struct cpufreq_poli if (ret) goto error_out; - down_read(&cpufreq_notifier_rwsem); - /* adjust if necessary - all reasons */ - notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_ADJUST, - policy); + blocking_notifier_call_chain(&cpufreq_policy_notifier_list, + CPUFREQ_ADJUST, policy); /* adjust if necessary - hardware incompatibility*/ - notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_INCOMPATIBLE, - policy); + blocking_notifier_call_chain(&cpufreq_policy_notifier_list, + CPUFREQ_INCOMPATIBLE, policy); /* verify the cpu speed can be set within this limit, which might be different to the first one */ ret = cpufreq_driver->verify(policy); - if (ret) { - up_read(&cpufreq_notifier_rwsem); + if (ret) goto error_out; - } /* notification of the new policy */ - notifier_call_chain(&cpufreq_policy_notifier_list, CPUFREQ_NOTIFY, - policy); - - up_read(&cpufreq_notifier_rwsem); + blocking_notifier_call_chain(&cpufreq_policy_notifier_list, + CPUFREQ_NOTIFY, policy); data->min = policy->min; data->max = policy->max; diff --git a/drivers/firmware/dcdbas.c b/drivers/firmware/dcdbas.c index d6543fc4a92..339f405ff70 100644 --- a/drivers/firmware/dcdbas.c +++ b/drivers/firmware/dcdbas.c @@ -484,26 +484,15 @@ static void dcdbas_host_control(void) static int dcdbas_reboot_notify(struct notifier_block *nb, unsigned long code, void *unused) { - static unsigned int notify_cnt = 0; - switch (code) { case SYS_DOWN: case SYS_HALT: case SYS_POWER_OFF: if (host_control_on_shutdown) { /* firmware is going to perform host control action */ - if (++notify_cnt == 2) { - printk(KERN_WARNING - "Please wait for shutdown " - "action to complete...\n"); - dcdbas_host_control(); - } - /* - * register again and initiate the host control - * action on the second notification to allow - * everyone that registered to be notified - */ - register_reboot_notifier(nb); + printk(KERN_WARNING "Please wait for shutdown " + "action to complete...\n"); + dcdbas_host_control(); } break; } @@ -514,7 +503,7 @@ static int dcdbas_reboot_notify(struct notifier_block *nb, unsigned long code, static struct notifier_block dcdbas_reboot_nb = { .notifier_call = dcdbas_reboot_notify, .next = NULL, - .priority = 0 + .priority = INT_MIN }; static DCDBAS_BIN_ATTR_RW(smi_data); diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c index d2ead1776c1..34fcabac5fd 100644 --- a/drivers/macintosh/adb.c +++ b/drivers/macintosh/adb.c @@ -80,7 +80,7 @@ static struct adb_driver *adb_driver_list[] = { static struct class *adb_dev_class; struct adb_driver *adb_controller; -struct notifier_block *adb_client_list = NULL; +BLOCKING_NOTIFIER_HEAD(adb_client_list); static int adb_got_sleep; static int adb_inited; static pid_t adb_probe_task_pid; @@ -354,7 +354,8 @@ adb_notify_sleep(struct pmu_sleep_notifier *self, int when) /* Stop autopoll */ if (adb_controller->autopoll) adb_controller->autopoll(0); - ret = notifier_call_chain(&adb_client_list, ADB_MSG_POWERDOWN, NULL); + ret = blocking_notifier_call_chain(&adb_client_list, + ADB_MSG_POWERDOWN, NULL); if (ret & NOTIFY_STOP_MASK) { up(&adb_probe_mutex); return PBOOK_SLEEP_REFUSE; @@ -391,7 +392,8 @@ do_adb_reset_bus(void) if (adb_controller->autopoll) adb_controller->autopoll(0); - nret = notifier_call_chain(&adb_client_list, ADB_MSG_PRE_RESET, NULL); + nret = blocking_notifier_call_chain(&adb_client_list, + ADB_MSG_PRE_RESET, NULL); if (nret & NOTIFY_STOP_MASK) { if (adb_controller->autopoll) adb_controller->autopoll(autopoll_devs); @@ -426,7 +428,8 @@ do_adb_reset_bus(void) } up(&adb_handler_sem); - nret = notifier_call_chain(&adb_client_list, ADB_MSG_POST_RESET, NULL); + nret = blocking_notifier_call_chain(&adb_client_list, + ADB_MSG_POST_RESET, NULL); if (nret & NOTIFY_STOP_MASK) return -EBUSY; diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c index c0b46bceb5d..f5779a73184 100644 --- a/drivers/macintosh/adbhid.c +++ b/drivers/macintosh/adbhid.c @@ -1214,7 +1214,8 @@ static int __init adbhid_init(void) adbhid_probe(); - notifier_chain_register(&adb_client_list, &adbhid_adb_notifier); + blocking_notifier_chain_register(&adb_client_list, + &adbhid_adb_notifier); return 0; } diff --git a/drivers/macintosh/via-pmu.c b/drivers/macintosh/via-pmu.c index 4f5f3abc9cb..0b5ff553e39 100644 --- a/drivers/macintosh/via-pmu.c +++ b/drivers/macintosh/via-pmu.c @@ -187,7 +187,7 @@ extern int disable_kernel_backlight; int __fake_sleep; int asleep; -struct notifier_block *sleep_notifier_list; +BLOCKING_NOTIFIER_HEAD(sleep_notifier_list); #ifdef CONFIG_ADB static int adb_dev_map = 0; diff --git a/drivers/macintosh/via-pmu68k.c b/drivers/macintosh/via-pmu68k.c index f08e52f2107..35b70323e7e 100644 --- a/drivers/macintosh/via-pmu68k.c +++ b/drivers/macintosh/via-pmu68k.c @@ -102,7 +102,7 @@ static int pmu_kind = PMU_UNKNOWN; static int pmu_fully_inited = 0; int asleep; -struct notifier_block *sleep_notifier_list; +BLOCKING_NOTIFIER_HEAD(sleep_notifier_list); static int pmu_probe(void); static int pmu_init(void); @@ -913,7 +913,8 @@ int powerbook_sleep(void) struct adb_request sleep_req; /* Notify device drivers */ - ret = notifier_call_chain(&sleep_notifier_list, PBOOK_SLEEP, NULL); + ret = blocking_notifier_call_chain(&sleep_notifier_list, + PBOOK_SLEEP, NULL); if (ret & NOTIFY_STOP_MASK) return -EBUSY; @@ -984,7 +985,7 @@ int powerbook_sleep(void) enable_irq(i); /* Notify drivers */ - notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL); + blocking_notifier_call_chain(&sleep_notifier_list, PBOOK_WAKE, NULL); /* reenable ADB autopoll */ pmu_adb_autopoll(adb_dev_map); diff --git a/drivers/macintosh/windfarm_core.c b/drivers/macintosh/windfarm_core.c index 6c0ba04bc57..ab3faa702d5 100644 --- a/drivers/macintosh/windfarm_core.c +++ b/drivers/macintosh/windfarm_core.c @@ -52,7 +52,7 @@ static LIST_HEAD(wf_controls); static LIST_HEAD(wf_sensors); static DEFINE_MUTEX(wf_lock); -static struct notifier_block *wf_client_list; +static BLOCKING_NOTIFIER_HEAD(wf_client_list); static int wf_client_count; static unsigned int wf_overtemp; static unsigned int wf_overtemp_counter; @@ -68,7 +68,7 @@ static struct platform_device wf_platform_device = { static inline void wf_notify(int event, void *param) { - notifier_call_chain(&wf_client_list, event, param); + blocking_notifier_call_chain(&wf_client_list, event, param); } int wf_critical_overtemp(void) @@ -398,7 +398,7 @@ int wf_register_client(struct notifier_block *nb) struct wf_sensor *sr; mutex_lock(&wf_lock); - rc = notifier_chain_register(&wf_client_list, nb); + rc = blocking_notifier_chain_register(&wf_client_list, nb); if (rc != 0) goto bail; wf_client_count++; @@ -417,7 +417,7 @@ EXPORT_SYMBOL_GPL(wf_register_client); int wf_unregister_client(struct notifier_block *nb) { mutex_lock(&wf_lock); - notifier_chain_unregister(&wf_client_list, nb); + blocking_notifier_chain_unregister(&wf_client_list, nb); wf_client_count++; if (wf_client_count == 0) wf_stop_thread(); diff --git a/drivers/misc/ibmasm/heartbeat.c b/drivers/misc/ibmasm/heartbeat.c index f295401fac2..7fd7a43e38d 100644 --- a/drivers/misc/ibmasm/heartbeat.c +++ b/drivers/misc/ibmasm/heartbeat.c @@ -52,12 +52,13 @@ static struct notifier_block panic_notifier = { panic_happened, NULL, 1 }; void ibmasm_register_panic_notifier(void) { - notifier_chain_register(&panic_notifier_list, &panic_notifier); + atomic_notifier_chain_register(&panic_notifier_list, &panic_notifier); } void ibmasm_unregister_panic_notifier(void) { - notifier_chain_unregister(&panic_notifier_list, &panic_notifier); + atomic_notifier_chain_unregister(&panic_notifier_list, + &panic_notifier); } diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 2d0ac169a86..f13a539dc16 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3159,7 +3159,7 @@ static int bond_slave_netdev_event(unsigned long event, struct net_device *slave * bond_netdev_event: handle netdev notifier chain events. * * This function receives events for the netdev chain. The caller (an - * ioctl handler calling notifier_call_chain) holds the necessary + * ioctl handler calling blocking_notifier_call_chain) holds the necessary * locks for us to safely manipulate the slave devices (RTNL lock, * dev_probe_lock). */ diff --git a/drivers/parisc/led.c b/drivers/parisc/led.c index 3627a2d7f79..298f2ddb2c1 100644 --- a/drivers/parisc/led.c +++ b/drivers/parisc/led.c @@ -499,11 +499,16 @@ static int led_halt(struct notifier_block *, unsigned long, void *); static struct notifier_block led_notifier = { .notifier_call = led_halt, }; +static int notifier_disabled = 0; static int led_halt(struct notifier_block *nb, unsigned long event, void *buf) { char *txt; - + + if (notifier_disabled) + return NOTIFY_OK; + + notifier_disabled = 1; switch (event) { case SYS_RESTART: txt = "SYSTEM RESTART"; break; @@ -527,7 +532,6 @@ static int led_halt(struct notifier_block *nb, unsigned long event, void *buf) if (led_func_ptr) led_func_ptr(0xff); /* turn all LEDs ON */ - unregister_reboot_notifier(&led_notifier); return NOTIFY_OK; } @@ -758,6 +762,12 @@ not_found: return 1; } +static void __exit led_exit(void) +{ + unregister_reboot_notifier(&led_notifier); + return; +} + #ifdef CONFIG_PROC_FS module_init(led_create_procfs) #endif diff --git a/drivers/parisc/power.c b/drivers/parisc/power.c index 54b2b7f20b9..0bcab83b408 100644 --- a/drivers/parisc/power.c +++ b/drivers/parisc/power.c @@ -251,7 +251,8 @@ static int __init power_init(void) } /* Register a call for panic conditions. */ - notifier_chain_register(&panic_notifier_list, &parisc_panic_block); + atomic_notifier_chain_register(&panic_notifier_list, + &parisc_panic_block); tasklet_enable(&power_tasklet); @@ -264,7 +265,8 @@ static void __exit power_exit(void) return; tasklet_disable(&power_tasklet); - notifier_chain_unregister(&panic_notifier_list, &parisc_panic_block); + atomic_notifier_chain_unregister(&panic_notifier_list, + &parisc_panic_block); power_tasklet.func = NULL; pdc_soft_power_button(0); } diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c index 62e3cda859a..7f7013e80a8 100644 --- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -671,7 +671,7 @@ static struct file_operations gdth_fops = { static struct notifier_block gdth_notifier = { gdth_halt, NULL, 0 }; - +static int notifier_disabled = 0; static void gdth_delay(int milliseconds) { @@ -4595,13 +4595,13 @@ static int __init gdth_detect(struct scsi_host_template *shtp) add_timer(&gdth_timer); #endif major = register_chrdev(0,"gdth",&gdth_fops); + notifier_disabled = 0; register_reboot_notifier(&gdth_notifier); } gdth_polling = FALSE; return gdth_ctr_vcount; } - static int gdth_release(struct Scsi_Host *shp) { int hanum; @@ -5632,10 +5632,14 @@ static int gdth_halt(struct notifier_block *nb, ulong event, void *buf) char cmnd[MAX_COMMAND_SIZE]; #endif + if (notifier_disabled) + return NOTIFY_OK; + TRACE2(("gdth_halt() event %d\n",(int)event)); if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF) return NOTIFY_DONE; + notifier_disabled = 1; printk("GDT-HA: Flushing all host drives .. "); for (hanum = 0; hanum < gdth_ctr_count; ++hanum) { gdth_flush(hanum); @@ -5679,7 +5683,6 @@ static int gdth_halt(struct notifier_block *nb, ulong event, void *buf) #ifdef GDTH_STATISTICS del_timer(&gdth_timer); #endif - unregister_reboot_notifier(&gdth_notifier); return NOTIFY_OK; } diff --git a/drivers/usb/core/notify.c b/drivers/usb/core/notify.c index 4b55285de9a..fe0ed54fa0a 100644 --- a/drivers/usb/core/notify.c +++ b/drivers/usb/core/notify.c @@ -16,57 +16,7 @@ #include #include "usb.h" - -static struct notifier_block *usb_notifier_list; -static DEFINE_MUTEX(usb_notifier_lock); - -static void usb_notifier_chain_register(struct notifier_block **list, - struct notifier_block *n) -{ - mutex_lock(&usb_notifier_lock); - while (*list) { - if (n->priority > (*list)->priority) - break; - list = &((*list)->next); - } - n->next = *list; - *list = n; - mutex_unlock(&usb_notifier_lock); -} - -static void usb_notifier_chain_unregister(struct notifier_block **nl, - struct notifier_block *n) -{ - mutex_lock(&usb_notifier_lock); - while ((*nl)!=NULL) { - if ((*nl)==n) { - *nl = n->next; - goto exit; - } - nl=&((*nl)->next); - } -exit: - mutex_unlock(&usb_notifier_lock); -} - -static int usb_notifier_call_chain(struct notifier_block **n, - unsigned long val, void *v) -{ - int ret=NOTIFY_DONE; - struct notifier_block *nb = *n; - - mutex_lock(&usb_notifier_lock); - while (nb) { - ret = nb->notifier_call(nb,val,v); - if (ret&NOTIFY_STOP_MASK) { - goto exit; - } - nb = nb->next; - } -exit: - mutex_unlock(&usb_notifier_lock); - return ret; -} +static BLOCKING_NOTIFIER_HEAD(usb_notifier_list); /** * usb_register_notify - register a notifier callback whenever a usb change happens @@ -76,7 +26,7 @@ exit: */ void usb_register_notify(struct notifier_block *nb) { - usb_notifier_chain_register(&usb_notifier_list, nb); + blocking_notifier_chain_register(&usb_notifier_list, nb); } EXPORT_SYMBOL_GPL(usb_register_notify); @@ -89,27 +39,28 @@ EXPORT_SYMBOL_GPL(usb_register_notify); */ void usb_unregister_notify(struct notifier_block *nb) { - usb_notifier_chain_unregister(&usb_notifier_list, nb); + blocking_notifier_chain_unregister(&usb_notifier_list, nb); } EXPORT_SYMBOL_GPL(usb_unregister_notify); void usb_notify_add_device(struct usb_device *udev) { - usb_notifier_call_chain(&usb_notifier_list, USB_DEVICE_ADD, udev); + blocking_notifier_call_chain(&usb_notifier_list, USB_DEVICE_ADD, udev); } void usb_notify_remove_device(struct usb_device *udev) { - usb_notifier_call_chain(&usb_notifier_list, USB_DEVICE_REMOVE, udev); + blocking_notifier_call_chain(&usb_notifier_list, + USB_DEVICE_REMOVE, udev); } void usb_notify_add_bus(struct usb_bus *ubus) { - usb_notifier_call_chain(&usb_notifier_list, USB_BUS_ADD, ubus); + blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_ADD, ubus); } void usb_notify_remove_bus(struct usb_bus *ubus) { - usb_notifier_call_chain(&usb_notifier_list, USB_BUS_REMOVE, ubus); + blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_REMOVE, ubus); } diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 07d882b1439..b1a8dca7643 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -55,7 +55,7 @@ #define FBPIXMAPSIZE (1024 * 8) -static struct notifier_block *fb_notifier_list; +static BLOCKING_NOTIFIER_HEAD(fb_notifier_list); struct fb_info *registered_fb[FB_MAX]; int num_registered_fb; @@ -784,7 +784,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) event.info = info; event.data = &mode1; - ret = notifier_call_chain(&fb_notifier_list, + ret = blocking_notifier_call_chain(&fb_notifier_list, FB_EVENT_MODE_DELETE, &event); } @@ -830,8 +830,8 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) info->flags &= ~FBINFO_MISC_USEREVENT; event.info = info; - notifier_call_chain(&fb_notifier_list, evnt, - &event); + blocking_notifier_call_chain(&fb_notifier_list, + evnt, &event); } } } @@ -854,7 +854,8 @@ fb_blank(struct fb_info *info, int blank) event.info = info; event.data = ␣ - notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event); + blocking_notifier_call_chain(&fb_notifier_list, + FB_EVENT_BLANK, &event); } return ret; @@ -925,7 +926,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, con2fb.framebuffer = -1; event.info = info; event.data = &con2fb; - notifier_call_chain(&fb_notifier_list, + blocking_notifier_call_chain(&fb_notifier_list, FB_EVENT_GET_CONSOLE_MAP, &event); return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; @@ -944,7 +945,7 @@ fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, return -EINVAL; event.info = info; event.data = &con2fb; - return notifier_call_chain(&fb_notifier_list, + return blocking_notifier_call_chain(&fb_notifier_list, FB_EVENT_SET_CONSOLE_MAP, &event); case FBIOBLANK: @@ -1324,7 +1325,7 @@ register_framebuffer(struct fb_info *fb_info) devfs_mk_cdev(MKDEV(FB_MAJOR, i), S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); event.info = fb_info; - notifier_call_chain(&fb_notifier_list, + blocking_notifier_call_chain(&fb_notifier_list, FB_EVENT_FB_REGISTERED, &event); return 0; } @@ -1366,7 +1367,7 @@ unregister_framebuffer(struct fb_info *fb_info) */ int fb_register_client(struct notifier_block *nb) { - return notifier_chain_register(&fb_notifier_list, nb); + return blocking_notifier_chain_register(&fb_notifier_list, nb); } /** @@ -1375,7 +1376,7 @@ int fb_register_client(struct notifier_block *nb) */ int fb_unregister_client(struct notifier_block *nb) { - return notifier_chain_unregister(&fb_notifier_list, nb); + return blocking_notifier_chain_unregister(&fb_notifier_list, nb); } /** @@ -1393,11 +1394,13 @@ void fb_set_suspend(struct fb_info *info, int state) event.info = info; if (state) { - notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event); + blocking_notifier_call_chain(&fb_notifier_list, + FB_EVENT_SUSPEND, &event); info->state = FBINFO_STATE_SUSPENDED; } else { info->state = FBINFO_STATE_RUNNING; - notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event); + blocking_notifier_call_chain(&fb_notifier_list, + FB_EVENT_RESUME, &event); } } @@ -1469,7 +1472,7 @@ int fb_new_modelist(struct fb_info *info) if (!list_empty(&info->modelist)) { event.info = info; - err = notifier_call_chain(&fb_notifier_list, + err = blocking_notifier_call_chain(&fb_notifier_list, FB_EVENT_NEW_MODELIST, &event); } @@ -1495,7 +1498,7 @@ int fb_con_duit(struct fb_info *info, int event, void *data) evnt.info = info; evnt.data = data; - return notifier_call_chain(&fb_notifier_list, event, &evnt); + return blocking_notifier_call_chain(&fb_notifier_list, event, &evnt); } EXPORT_SYMBOL(fb_con_duit); diff --git a/include/asm-i386/kdebug.h b/include/asm-i386/kdebug.h index 316138e8991..96d0828ce09 100644 --- a/include/asm-i386/kdebug.h +++ b/include/asm-i386/kdebug.h @@ -17,11 +17,9 @@ struct die_args { int signr; }; -/* Note - you should never unregister because that can race with NMIs. - If you really want to do it first unregister - then synchronize_sched - then free. - */ -int register_die_notifier(struct notifier_block *nb); -extern struct notifier_block *i386die_chain; +extern int register_die_notifier(struct notifier_block *); +extern int unregister_die_notifier(struct notifier_block *); +extern struct atomic_notifier_head i386die_chain; /* Grossly misnamed. */ @@ -51,7 +49,7 @@ static inline int notify_die(enum die_val val, const char *str, .trapnr = trap, .signr = sig }; - return notifier_call_chain(&i386die_chain, val, &args); + return atomic_notifier_call_chain(&i386die_chain, val, &args); } #endif diff --git a/include/asm-ia64/kdebug.h b/include/asm-ia64/kdebug.h index 8b01a083dde..218c458ab60 100644 --- a/include/asm-ia64/kdebug.h +++ b/include/asm-ia64/kdebug.h @@ -40,7 +40,7 @@ struct die_args { extern int register_die_notifier(struct notifier_block *); extern int unregister_die_notifier(struct notifier_block *); -extern struct notifier_block *ia64die_chain; +extern struct atomic_notifier_head ia64die_chain; enum die_val { DIE_BREAK = 1, @@ -81,7 +81,7 @@ static inline int notify_die(enum die_val val, char *str, struct pt_regs *regs, .signr = sig }; - return notifier_call_chain(&ia64die_chain, val, &args); + return atomic_notifier_call_chain(&ia64die_chain, val, &args); } #endif diff --git a/include/asm-powerpc/kdebug.h b/include/asm-powerpc/kdebug.h index 7c16265568e..c01786ab5fa 100644 --- a/include/asm-powerpc/kdebug.h +++ b/include/asm-powerpc/kdebug.h @@ -16,13 +16,9 @@ struct die_args { int signr; }; -/* - Note - you should never unregister because that can race with NMIs. - If you really want to do it first unregister - then synchronize_sched - - then free. - */ -int register_die_notifier(struct notifier_block *nb); -extern struct notifier_block *powerpc_die_chain; +extern int register_die_notifier(struct notifier_block *); +extern int unregister_die_notifier(struct notifier_block *); +extern struct atomic_notifier_head powerpc_die_chain; /* Grossly misnamed. */ enum die_val { @@ -37,7 +33,7 @@ enum die_val { static inline int notify_die(enum die_val val,char *str,struct pt_regs *regs,long err,int trap, int sig) { struct die_args args = { .regs=regs, .str=str, .err=err, .trapnr=trap,.signr=sig }; - return notifier_call_chain(&powerpc_die_chain, val, &args); + return atomic_notifier_call_chain(&powerpc_die_chain, val, &args); } #endif /* __KERNEL__ */ diff --git a/include/asm-sparc64/kdebug.h b/include/asm-sparc64/kdebug.h index 6321f5a0198..4040d127ac3 100644 --- a/include/asm-sparc64/kdebug.h +++ b/include/asm-sparc64/kdebug.h @@ -15,12 +15,9 @@ struct die_args { int signr; }; -/* Note - you should never unregister because that can race with NMIs. - * If you really want to do it first unregister - then synchronize_sched - * - then free. - */ -int register_die_notifier(struct notifier_block *nb); -extern struct notifier_block *sparc64die_chain; +extern int register_die_notifier(struct notifier_block *); +extern int unregister_die_notifier(struct notifier_block *); +extern struct atomic_notifier_head sparc64die_chain; extern void bad_trap(struct pt_regs *, long); @@ -46,7 +43,7 @@ static inline int notify_die(enum die_val val,char *str, struct pt_regs *regs, .trapnr = trap, .signr = sig }; - return notifier_call_chain(&sparc64die_chain, val, &args); + return atomic_notifier_call_chain(&sparc64die_chain, val, &args); } #endif diff --git a/include/asm-x86_64/kdebug.h b/include/asm-x86_64/kdebug.h index b9ed4c0c878..cf795631d9b 100644 --- a/include/asm-x86_64/kdebug.h +++ b/include/asm-x86_64/kdebug.h @@ -5,21 +5,20 @@ struct pt_regs; -struct die_args { +struct die_args { struct pt_regs *regs; const char *str; - long err; + long err; int trapnr; int signr; -}; +}; + +extern int register_die_notifier(struct notifier_block *); +extern int unregister_die_notifier(struct notifier_block *); +extern struct atomic_notifier_head die_chain; -/* Note - you should never unregister because that can race with NMIs. - If you really want to do it first unregister - then synchronize_sched - then free. - */ -int register_die_notifier(struct notifier_block *nb); -extern struct notifier_block *die_chain; /* Grossly misnamed. */ -enum die_val { +enum die_val { DIE_OOPS = 1, DIE_INT3, DIE_DEBUG, @@ -33,8 +32,8 @@ enum die_val { DIE_CALL, DIE_NMI_IPI, DIE_PAGE_FAULT, -}; - +}; + static inline int notify_die(enum die_val val, const char *str, struct pt_regs *regs, long err, int trap, int sig) { @@ -45,7 +44,7 @@ static inline int notify_die(enum die_val val, const char *str, .trapnr = trap, .signr = sig }; - return notifier_call_chain(&die_chain, val, &args); + return atomic_notifier_call_chain(&die_chain, val, &args); } extern int printk_address(unsigned long address); diff --git a/include/linux/adb.h b/include/linux/adb.h index e9fdc63483c..b7305b17827 100644 --- a/include/linux/adb.h +++ b/include/linux/adb.h @@ -85,7 +85,7 @@ enum adb_message { ADB_MSG_POST_RESET /* Called after resetting the bus (re-do init & register) */ }; extern struct adb_driver *adb_controller; -extern struct notifier_block *adb_client_list; +extern struct blocking_notifier_head adb_client_list; int adb_request(struct adb_request *req, void (*done)(struct adb_request *), int flags, int nbytes, ...); diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 03d6cfaa5b8..a3720f973ea 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -87,7 +87,7 @@ extern int cond_resched(void); (__x < 0) ? -__x : __x; \ }) -extern struct notifier_block *panic_notifier_list; +extern struct atomic_notifier_head panic_notifier_list; extern long (*panic_blink)(long time); NORET_TYPE void panic(const char * fmt, ...) __attribute__ ((NORET_AND format (printf, 1, 2))); diff --git a/include/linux/memory.h b/include/linux/memory.h index e251dc43d0f..8f04143ca36 100644 --- a/include/linux/memory.h +++ b/include/linux/memory.h @@ -77,7 +77,6 @@ extern int remove_memory_block(unsigned long, struct mem_section *, int); #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION< +#include +#include -struct notifier_block -{ - int (*notifier_call)(struct notifier_block *self, unsigned long, void *); +/* + * Notifier chains are of three types: + * + * Atomic notifier chains: Chain callbacks run in interrupt/atomic + * context. Callouts are not allowed to block. + * Blocking notifier chains: Chain callbacks run in process context. + * Callouts are allowed to block. + * Raw notifier chains: There are no restrictions on callbacks, + * registration, or unregistration. All locking and protection + * must be provided by the caller. + * + * atomic_notifier_chain_register() may be called from an atomic context, + * but blocking_notifier_chain_register() must be called from a process + * context. Ditto for the corresponding _unregister() routines. + * + * atomic_notifier_chain_unregister() and blocking_notifier_chain_unregister() + * _must not_ be called from within the call chain. + */ + +struct notifier_block { + int (*notifier_call)(struct notifier_block *, unsigned long, void *); struct notifier_block *next; int priority; }; +struct atomic_notifier_head { + spinlock_t lock; + struct notifier_block *head; +}; + +struct blocking_notifier_head { + struct rw_semaphore rwsem; + struct notifier_block *head; +}; + +struct raw_notifier_head { + struct notifier_block *head; +}; + +#define ATOMIC_INIT_NOTIFIER_HEAD(name) do { \ + spin_lock_init(&(name)->lock); \ + (name)->head = NULL; \ + } while (0) +#define BLOCKING_INIT_NOTIFIER_HEAD(name) do { \ + init_rwsem(&(name)->rwsem); \ + (name)->head = NULL; \ + } while (0) +#define RAW_INIT_NOTIFIER_HEAD(name) do { \ + (name)->head = NULL; \ + } while (0) + +#define ATOMIC_NOTIFIER_INIT(name) { \ + .lock = SPIN_LOCK_UNLOCKED, \ + .head = NULL } +#define BLOCKING_NOTIFIER_INIT(name) { \ + .rwsem = __RWSEM_INITIALIZER((name).rwsem), \ + .head = NULL } +#define RAW_NOTIFIER_INIT(name) { \ + .head = NULL } + +#define ATOMIC_NOTIFIER_HEAD(name) \ + struct atomic_notifier_head name = \ + ATOMIC_NOTIFIER_INIT(name) +#define BLOCKING_NOTIFIER_HEAD(name) \ + struct blocking_notifier_head name = \ + BLOCKING_NOTIFIER_INIT(name) +#define RAW_NOTIFIER_HEAD(name) \ + struct raw_notifier_head name = \ + RAW_NOTIFIER_INIT(name) #ifdef __KERNEL__ -extern int notifier_chain_register(struct notifier_block **list, struct notifier_block *n); -extern int notifier_chain_unregister(struct notifier_block **nl, struct notifier_block *n); -extern int notifier_call_chain(struct notifier_block **n, unsigned long val, void *v); +extern int atomic_notifier_chain_register(struct atomic_notifier_head *, + struct notifier_block *); +extern int blocking_notifier_chain_register(struct blocking_notifier_head *, + struct notifier_block *); +extern int raw_notifier_chain_register(struct raw_notifier_head *, + struct notifier_block *); + +extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *, + struct notifier_block *); +extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *, + struct notifier_block *); +extern int raw_notifier_chain_unregister(struct raw_notifier_head *, + struct notifier_block *); + +extern int atomic_notifier_call_chain(struct atomic_notifier_head *, + unsigned long val, void *v); +extern int blocking_notifier_call_chain(struct blocking_notifier_head *, + unsigned long val, void *v); +extern int raw_notifier_call_chain(struct raw_notifier_head *, + unsigned long val, void *v); #define NOTIFY_DONE 0x0000 /* Don't care */ #define NOTIFY_OK 0x0001 /* Suits me */ #define NOTIFY_STOP_MASK 0x8000 /* Don't call further */ -#define NOTIFY_BAD (NOTIFY_STOP_MASK|0x0002) /* Bad/Veto action */ +#define NOTIFY_BAD (NOTIFY_STOP_MASK|0x0002) + /* Bad/Veto action */ /* * Clean way to return from the notifier and stop further calls. */ diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h index b6f0905a4ee..916013ca4a5 100644 --- a/include/net/netfilter/nf_conntrack.h +++ b/include/net/netfilter/nf_conntrack.h @@ -300,29 +300,30 @@ DECLARE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache); #define CONNTRACK_ECACHE(x) (__get_cpu_var(nf_conntrack_ecache).x) -extern struct notifier_block *nf_conntrack_chain; -extern struct notifier_block *nf_conntrack_expect_chain; +extern struct atomic_notifier_head nf_conntrack_chain; +extern struct atomic_notifier_head nf_conntrack_expect_chain; static inline int nf_conntrack_register_notifier(struct notifier_block *nb) { - return notifier_chain_register(&nf_conntrack_chain, nb); + return atomic_notifier_chain_register(&nf_conntrack_chain, nb); } static inline int nf_conntrack_unregister_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&nf_conntrack_chain, nb); + return atomic_notifier_chain_unregister(&nf_conntrack_chain, nb); } static inline int nf_conntrack_expect_register_notifier(struct notifier_block *nb) { - return notifier_chain_register(&nf_conntrack_expect_chain, nb); + return atomic_notifier_chain_register(&nf_conntrack_expect_chain, nb); } static inline int nf_conntrack_expect_unregister_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&nf_conntrack_expect_chain, nb); + return atomic_notifier_chain_unregister(&nf_conntrack_expect_chain, + nb); } extern void nf_ct_deliver_cached_events(const struct nf_conn *ct); @@ -347,14 +348,14 @@ static inline void nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct) { if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) - notifier_call_chain(&nf_conntrack_chain, event, ct); + atomic_notifier_call_chain(&nf_conntrack_chain, event, ct); } static inline void nf_conntrack_expect_event(enum ip_conntrack_expect_events event, struct nf_conntrack_expect *exp) { - notifier_call_chain(&nf_conntrack_expect_chain, event, exp); + atomic_notifier_call_chain(&nf_conntrack_expect_chain, event, exp); } #else /* CONFIG_NF_CONNTRACK_EVENTS */ static inline void nf_conntrack_event_cache(enum ip_conntrack_events event, diff --git a/kernel/cpu.c b/kernel/cpu.c index 8be22bd8093..fe2b8d0bfe4 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -18,7 +18,7 @@ /* This protects CPUs going up and down... */ static DECLARE_MUTEX(cpucontrol); -static struct notifier_block *cpu_chain; +static BLOCKING_NOTIFIER_HEAD(cpu_chain); #ifdef CONFIG_HOTPLUG_CPU static struct task_struct *lock_cpu_hotplug_owner; @@ -71,21 +71,13 @@ EXPORT_SYMBOL_GPL(lock_cpu_hotplug_interruptible); /* Need to know about CPUs going up/down? */ int register_cpu_notifier(struct notifier_block *nb) { - int ret; - - if ((ret = lock_cpu_hotplug_interruptible()) != 0) - return ret; - ret = notifier_chain_register(&cpu_chain, nb); - unlock_cpu_hotplug(); - return ret; + return blocking_notifier_chain_register(&cpu_chain, nb); } EXPORT_SYMBOL(register_cpu_notifier); void unregister_cpu_notifier(struct notifier_block *nb) { - lock_cpu_hotplug(); - notifier_chain_unregister(&cpu_chain, nb); - unlock_cpu_hotplug(); + blocking_notifier_chain_unregister(&cpu_chain, nb); } EXPORT_SYMBOL(unregister_cpu_notifier); @@ -141,7 +133,7 @@ int cpu_down(unsigned int cpu) goto out; } - err = notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE, + err = blocking_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE, (void *)(long)cpu); if (err == NOTIFY_BAD) { printk("%s: attempt to take down CPU %u failed\n", @@ -159,7 +151,7 @@ int cpu_down(unsigned int cpu) p = __stop_machine_run(take_cpu_down, NULL, cpu); if (IS_ERR(p)) { /* CPU didn't die: tell everyone. Can't complain. */ - if (notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED, + if (blocking_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED, (void *)(long)cpu) == NOTIFY_BAD) BUG(); @@ -182,8 +174,8 @@ int cpu_down(unsigned int cpu) put_cpu(); /* CPU is completely dead: tell everyone. Too late to complain. */ - if (notifier_call_chain(&cpu_chain, CPU_DEAD, (void *)(long)cpu) - == NOTIFY_BAD) + if (blocking_notifier_call_chain(&cpu_chain, CPU_DEAD, + (void *)(long)cpu) == NOTIFY_BAD) BUG(); check_for_tasks(cpu); @@ -211,7 +203,7 @@ int __devinit cpu_up(unsigned int cpu) goto out; } - ret = notifier_call_chain(&cpu_chain, CPU_UP_PREPARE, hcpu); + ret = blocking_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE, hcpu); if (ret == NOTIFY_BAD) { printk("%s: attempt to bring up CPU %u failed\n", __FUNCTION__, cpu); @@ -226,11 +218,12 @@ int __devinit cpu_up(unsigned int cpu) BUG_ON(!cpu_online(cpu)); /* Now call notifier in preparation. */ - notifier_call_chain(&cpu_chain, CPU_ONLINE, hcpu); + blocking_notifier_call_chain(&cpu_chain, CPU_ONLINE, hcpu); out_notify: if (ret != 0) - notifier_call_chain(&cpu_chain, CPU_UP_CANCELED, hcpu); + blocking_notifier_call_chain(&cpu_chain, + CPU_UP_CANCELED, hcpu); out: unlock_cpu_hotplug(); return ret; diff --git a/kernel/module.c b/kernel/module.c index ddfe45ac2fd..4fafd58038a 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -64,26 +64,17 @@ static DEFINE_SPINLOCK(modlist_lock); static DEFINE_MUTEX(module_mutex); static LIST_HEAD(modules); -static DEFINE_MUTEX(notify_mutex); -static struct notifier_block * module_notify_list; +static BLOCKING_NOTIFIER_HEAD(module_notify_list); int register_module_notifier(struct notifier_block * nb) { - int err; - mutex_lock(¬ify_mutex); - err = notifier_chain_register(&module_notify_list, nb); - mutex_unlock(¬ify_mutex); - return err; + return blocking_notifier_chain_register(&module_notify_list, nb); } EXPORT_SYMBOL(register_module_notifier); int unregister_module_notifier(struct notifier_block * nb) { - int err; - mutex_lock(¬ify_mutex); - err = notifier_chain_unregister(&module_notify_list, nb); - mutex_unlock(¬ify_mutex); - return err; + return blocking_notifier_chain_unregister(&module_notify_list, nb); } EXPORT_SYMBOL(unregister_module_notifier); @@ -1816,9 +1807,8 @@ sys_init_module(void __user *umod, /* Drop lock so they can recurse */ mutex_unlock(&module_mutex); - mutex_lock(¬ify_mutex); - notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); - mutex_unlock(¬ify_mutex); + blocking_notifier_call_chain(&module_notify_list, + MODULE_STATE_COMING, mod); /* Start the module */ if (mod->init != NULL) diff --git a/kernel/panic.c b/kernel/panic.c index acd95adddb9..f895c7c01d5 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -29,7 +29,7 @@ static DEFINE_SPINLOCK(pause_on_oops_lock); int panic_timeout; EXPORT_SYMBOL(panic_timeout); -struct notifier_block *panic_notifier_list; +ATOMIC_NOTIFIER_HEAD(panic_notifier_list); EXPORT_SYMBOL(panic_notifier_list); @@ -97,7 +97,7 @@ NORET_TYPE void panic(const char * fmt, ...) smp_send_stop(); #endif - notifier_call_chain(&panic_notifier_list, 0, buf); + atomic_notifier_call_chain(&panic_notifier_list, 0, buf); if (!panic_blink) panic_blink = no_blink; diff --git a/kernel/profile.c b/kernel/profile.c index ad81f799a9b..5a730fdb1a2 100644 --- a/kernel/profile.c +++ b/kernel/profile.c @@ -87,72 +87,52 @@ void __init profile_init(void) #ifdef CONFIG_PROFILING -static DECLARE_RWSEM(profile_rwsem); -static DEFINE_RWLOCK(handoff_lock); -static struct notifier_block * task_exit_notifier; -static struct notifier_block * task_free_notifier; -static struct notifier_block * munmap_notifier; +static BLOCKING_NOTIFIER_HEAD(task_exit_notifier); +static ATOMIC_NOTIFIER_HEAD(task_free_notifier); +static BLOCKING_NOTIFIER_HEAD(munmap_notifier); void profile_task_exit(struct task_struct * task) { - down_read(&profile_rwsem); - notifier_call_chain(&task_exit_notifier, 0, task); - up_read(&profile_rwsem); + blocking_notifier_call_chain(&task_exit_notifier, 0, task); } int profile_handoff_task(struct task_struct * task) { int ret; - read_lock(&handoff_lock); - ret = notifier_call_chain(&task_free_notifier, 0, task); - read_unlock(&handoff_lock); + ret = atomic_notifier_call_chain(&task_free_notifier, 0, task); return (ret == NOTIFY_OK) ? 1 : 0; } void profile_munmap(unsigned long addr) { - down_read(&profile_rwsem); - notifier_call_chain(&munmap_notifier, 0, (void *)addr); - up_read(&profile_rwsem); + blocking_notifier_call_chain(&munmap_notifier, 0, (void *)addr); } int task_handoff_register(struct notifier_block * n) { - int err = -EINVAL; - - write_lock(&handoff_lock); - err = notifier_chain_register(&task_free_notifier, n); - write_unlock(&handoff_lock); - return err; + return atomic_notifier_chain_register(&task_free_notifier, n); } int task_handoff_unregister(struct notifier_block * n) { - int err = -EINVAL; - - write_lock(&handoff_lock); - err = notifier_chain_unregister(&task_free_notifier, n); - write_unlock(&handoff_lock); - return err; + return atomic_notifier_chain_unregister(&task_free_notifier, n); } int profile_event_register(enum profile_type type, struct notifier_block * n) { int err = -EINVAL; - down_write(&profile_rwsem); - switch (type) { case PROFILE_TASK_EXIT: - err = notifier_chain_register(&task_exit_notifier, n); + err = blocking_notifier_chain_register( + &task_exit_notifier, n); break; case PROFILE_MUNMAP: - err = notifier_chain_register(&munmap_notifier, n); + err = blocking_notifier_chain_register( + &munmap_notifier, n); break; } - up_write(&profile_rwsem); - return err; } @@ -161,18 +141,17 @@ int profile_event_unregister(enum profile_type type, struct notifier_block * n) { int err = -EINVAL; - down_write(&profile_rwsem); - switch (type) { case PROFILE_TASK_EXIT: - err = notifier_chain_unregister(&task_exit_notifier, n); + err = blocking_notifier_chain_unregister( + &task_exit_notifier, n); break; case PROFILE_MUNMAP: - err = notifier_chain_unregister(&munmap_notifier, n); + err = blocking_notifier_chain_unregister( + &munmap_notifier, n); break; } - up_write(&profile_rwsem); return err; } diff --git a/kernel/softlockup.c b/kernel/softlockup.c index d9b3d5847ed..ced91e1ff56 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -152,5 +152,5 @@ __init void spawn_softlockup_task(void) cpu_callback(&cpu_nfb, CPU_ONLINE, cpu); register_cpu_notifier(&cpu_nfb); - notifier_chain_register(&panic_notifier_list, &panic_block); + atomic_notifier_chain_register(&panic_notifier_list, &panic_block); } diff --git a/kernel/sys.c b/kernel/sys.c index 38bc73ede2b..c93d37f71ae 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -95,99 +95,304 @@ int cad_pid = 1; * and the like. */ -static struct notifier_block *reboot_notifier_list; -static DEFINE_RWLOCK(notifier_lock); +static BLOCKING_NOTIFIER_HEAD(reboot_notifier_list); + +/* + * Notifier chain core routines. The exported routines below + * are layered on top of these, with appropriate locking added. + */ + +static int notifier_chain_register(struct notifier_block **nl, + struct notifier_block *n) +{ + while ((*nl) != NULL) { + if (n->priority > (*nl)->priority) + break; + nl = &((*nl)->next); + } + n->next = *nl; + rcu_assign_pointer(*nl, n); + return 0; +} + +static int notifier_chain_unregister(struct notifier_block **nl, + struct notifier_block *n) +{ + while ((*nl) != NULL) { + if ((*nl) == n) { + rcu_assign_pointer(*nl, n->next); + return 0; + } + nl = &((*nl)->next); + } + return -ENOENT; +} + +static int __kprobes notifier_call_chain(struct notifier_block **nl, + unsigned long val, void *v) +{ + int ret = NOTIFY_DONE; + struct notifier_block *nb; + + nb = rcu_dereference(*nl); + while (nb) { + ret = nb->notifier_call(nb, val, v); + if ((ret & NOTIFY_STOP_MASK) == NOTIFY_STOP_MASK) + break; + nb = rcu_dereference(nb->next); + } + return ret; +} + +/* + * Atomic notifier chain routines. Registration and unregistration + * use a mutex, and call_chain is synchronized by RCU (no locks). + */ /** - * notifier_chain_register - Add notifier to a notifier chain - * @list: Pointer to root list pointer + * atomic_notifier_chain_register - Add notifier to an atomic notifier chain + * @nh: Pointer to head of the atomic notifier chain * @n: New entry in notifier chain * - * Adds a notifier to a notifier chain. + * Adds a notifier to an atomic notifier chain. * * Currently always returns zero. */ + +int atomic_notifier_chain_register(struct atomic_notifier_head *nh, + struct notifier_block *n) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&nh->lock, flags); + ret = notifier_chain_register(&nh->head, n); + spin_unlock_irqrestore(&nh->lock, flags); + return ret; +} + +EXPORT_SYMBOL_GPL(atomic_notifier_chain_register); + +/** + * atomic_notifier_chain_unregister - Remove notifier from an atomic notifier chain + * @nh: Pointer to head of the atomic notifier chain + * @n: Entry to remove from notifier chain + * + * Removes a notifier from an atomic notifier chain. + * + * Returns zero on success or %-ENOENT on failure. + */ +int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh, + struct notifier_block *n) +{ + unsigned long flags; + int ret; + + spin_lock_irqsave(&nh->lock, flags); + ret = notifier_chain_unregister(&nh->head, n); + spin_unlock_irqrestore(&nh->lock, flags); + synchronize_rcu(); + return ret; +} + +EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister); + +/** + * atomic_notifier_call_chain - Call functions in an atomic notifier chain + * @nh: Pointer to head of the atomic notifier chain + * @val: Value passed unmodified to notifier function + * @v: Pointer passed unmodified to notifier function + * + * Calls each function in a notifier chain in turn. The functions + * run in an atomic context, so they must not block. + * This routine uses RCU to synchronize with changes to the chain. + * + * If the return value of the notifier can be and'ed + * with %NOTIFY_STOP_MASK then atomic_notifier_call_chain + * will return immediately, with the return value of + * the notifier function which halted execution. + * Otherwise the return value is the return value + * of the last notifier function called. + */ -int notifier_chain_register(struct notifier_block **list, struct notifier_block *n) +int atomic_notifier_call_chain(struct atomic_notifier_head *nh, + unsigned long val, void *v) { - write_lock(¬ifier_lock); - while(*list) - { - if(n->priority > (*list)->priority) - break; - list= &((*list)->next); - } - n->next = *list; - *list=n; - write_unlock(¬ifier_lock); - return 0; + int ret; + + rcu_read_lock(); + ret = notifier_call_chain(&nh->head, val, v); + rcu_read_unlock(); + return ret; } -EXPORT_SYMBOL(notifier_chain_register); +EXPORT_SYMBOL_GPL(atomic_notifier_call_chain); + +/* + * Blocking notifier chain routines. All access to the chain is + * synchronized by an rwsem. + */ /** - * notifier_chain_unregister - Remove notifier from a notifier chain - * @nl: Pointer to root list pointer + * blocking_notifier_chain_register - Add notifier to a blocking notifier chain + * @nh: Pointer to head of the blocking notifier chain * @n: New entry in notifier chain * - * Removes a notifier from a notifier chain. + * Adds a notifier to a blocking notifier chain. + * Must be called in process context. * - * Returns zero on success, or %-ENOENT on failure. + * Currently always returns zero. */ -int notifier_chain_unregister(struct notifier_block **nl, struct notifier_block *n) +int blocking_notifier_chain_register(struct blocking_notifier_head *nh, + struct notifier_block *n) { - write_lock(¬ifier_lock); - while((*nl)!=NULL) - { - if((*nl)==n) - { - *nl=n->next; - write_unlock(¬ifier_lock); - return 0; - } - nl=&((*nl)->next); - } - write_unlock(¬ifier_lock); - return -ENOENT; + int ret; + + /* + * This code gets used during boot-up, when task switching is + * not yet working and interrupts must remain disabled. At + * such times we must not call down_write(). + */ + if (unlikely(system_state == SYSTEM_BOOTING)) + return notifier_chain_register(&nh->head, n); + + down_write(&nh->rwsem); + ret = notifier_chain_register(&nh->head, n); + up_write(&nh->rwsem); + return ret; } -EXPORT_SYMBOL(notifier_chain_unregister); +EXPORT_SYMBOL_GPL(blocking_notifier_chain_register); /** - * notifier_call_chain - Call functions in a notifier chain - * @n: Pointer to root pointer of notifier chain + * blocking_notifier_chain_unregister - Remove notifier from a blocking notifier chain + * @nh: Pointer to head of the blocking notifier chain + * @n: Entry to remove from notifier chain + * + * Removes a notifier from a blocking notifier chain. + * Must be called from process context. + * + * Returns zero on success or %-ENOENT on failure. + */ +int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh, + struct notifier_block *n) +{ + int ret; + + /* + * This code gets used during boot-up, when task switching is + * not yet working and interrupts must remain disabled. At + * such times we must not call down_write(). + */ + if (unlikely(system_state == SYSTEM_BOOTING)) + return notifier_chain_unregister(&nh->head, n); + + down_write(&nh->rwsem); + ret = notifier_chain_unregister(&nh->head, n); + up_write(&nh->rwsem); + return ret; +} + +EXPORT_SYMBOL_GPL(blocking_notifier_chain_unregister); + +/** + * blocking_notifier_call_chain - Call functions in a blocking notifier chain + * @nh: Pointer to head of the blocking notifier chain * @val: Value passed unmodified to notifier function * @v: Pointer passed unmodified to notifier function * - * Calls each function in a notifier chain in turn. + * Calls each function in a notifier chain in turn. The functions + * run in a process context, so they are allowed to block. * - * If the return value of the notifier can be and'd - * with %NOTIFY_STOP_MASK, then notifier_call_chain + * If the return value of the notifier can be and'ed + * with %NOTIFY_STOP_MASK then blocking_notifier_call_chain * will return immediately, with the return value of * the notifier function which halted execution. - * Otherwise, the return value is the return value + * Otherwise the return value is the return value * of the last notifier function called. */ -int __kprobes notifier_call_chain(struct notifier_block **n, unsigned long val, void *v) +int blocking_notifier_call_chain(struct blocking_notifier_head *nh, + unsigned long val, void *v) { - int ret=NOTIFY_DONE; - struct notifier_block *nb = *n; + int ret; - while(nb) - { - ret=nb->notifier_call(nb,val,v); - if(ret&NOTIFY_STOP_MASK) - { - return ret; - } - nb=nb->next; - } + down_read(&nh->rwsem); + ret = notifier_call_chain(&nh->head, val, v); + up_read(&nh->rwsem); return ret; } -EXPORT_SYMBOL(notifier_call_chain); +EXPORT_SYMBOL_GPL(blocking_notifier_call_chain); + +/* + * Raw notifier chain routines. There is no protection; + * the caller must provide it. Use at your own risk! + */ + +/** + * raw_notifier_chain_register - Add notifier to a raw notifier chain + * @nh: Pointer to head of the raw notifier chain + * @n: New entry in notifier chain + * + * Adds a notifier to a raw notifier chain. + * All locking must be provided by the caller. + * + * Currently always returns zero. + */ + +int raw_notifier_chain_register(struct raw_notifier_head *nh, + struct notifier_block *n) +{ + return notifier_chain_register(&nh->head, n); +} + +EXPORT_SYMBOL_GPL(raw_notifier_chain_register); + +/** + * raw_notifier_chain_unregister - Remove notifier from a raw notifier chain + * @nh: Pointer to head of the raw notifier chain + * @n: Entry to remove from notifier chain + * + * Removes a notifier from a raw notifier chain. + * All locking must be provided by the caller. + * + * Returns zero on success or %-ENOENT on failure. + */ +int raw_notifier_chain_unregister(struct raw_notifier_head *nh, + struct notifier_block *n) +{ + return notifier_chain_unregister(&nh->head, n); +} + +EXPORT_SYMBOL_GPL(raw_notifier_chain_unregister); + +/** + * raw_notifier_call_chain - Call functions in a raw notifier chain + * @nh: Pointer to head of the raw notifier chain + * @val: Value passed unmodified to notifier function + * @v: Pointer passed unmodified to notifier function + * + * Calls each function in a notifier chain in turn. The functions + * run in an undefined context. + * All locking must be provided by the caller. + * + * If the return value of the notifier can be and'ed + * with %NOTIFY_STOP_MASK then raw_notifier_call_chain + * will return immediately, with the return value of + * the notifier function which halted execution. + * Otherwise the return value is the return value + * of the last notifier function called. + */ + +int raw_notifier_call_chain(struct raw_notifier_head *nh, + unsigned long val, void *v) +{ + return notifier_call_chain(&nh->head, val, v); +} + +EXPORT_SYMBOL_GPL(raw_notifier_call_chain); /** * register_reboot_notifier - Register function to be called at reboot time @@ -196,13 +401,13 @@ EXPORT_SYMBOL(notifier_call_chain); * Registers a function with the list of functions * to be called at reboot time. * - * Currently always returns zero, as notifier_chain_register + * Currently always returns zero, as blocking_notifier_chain_register * always returns zero. */ int register_reboot_notifier(struct notifier_block * nb) { - return notifier_chain_register(&reboot_notifier_list, nb); + return blocking_notifier_chain_register(&reboot_notifier_list, nb); } EXPORT_SYMBOL(register_reboot_notifier); @@ -219,7 +424,7 @@ EXPORT_SYMBOL(register_reboot_notifier); int unregister_reboot_notifier(struct notifier_block * nb) { - return notifier_chain_unregister(&reboot_notifier_list, nb); + return blocking_notifier_chain_unregister(&reboot_notifier_list, nb); } EXPORT_SYMBOL(unregister_reboot_notifier); @@ -380,7 +585,7 @@ EXPORT_SYMBOL_GPL(emergency_restart); void kernel_restart_prepare(char *cmd) { - notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd); + blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd); system_state = SYSTEM_RESTART; device_shutdown(); } @@ -430,7 +635,7 @@ EXPORT_SYMBOL_GPL(kernel_kexec); void kernel_shutdown_prepare(enum system_states state) { - notifier_call_chain(&reboot_notifier_list, + blocking_notifier_call_chain(&reboot_notifier_list, (state == SYSTEM_HALT)?SYS_HALT:SYS_POWER_OFF, NULL); system_state = state; device_shutdown(); diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 9106354c781..a49a6975092 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -73,23 +73,23 @@ DEFINE_RWLOCK(hci_cb_list_lock); struct hci_proto *hci_proto[HCI_MAX_PROTO]; /* HCI notifiers list */ -static struct notifier_block *hci_notifier; +static ATOMIC_NOTIFIER_HEAD(hci_notifier); /* ---- HCI notifications ---- */ int hci_register_notifier(struct notifier_block *nb) { - return notifier_chain_register(&hci_notifier, nb); + return atomic_notifier_chain_register(&hci_notifier, nb); } int hci_unregister_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&hci_notifier, nb); + return atomic_notifier_chain_unregister(&hci_notifier, nb); } static void hci_notify(struct hci_dev *hdev, int event) { - notifier_call_chain(&hci_notifier, event, hdev); + atomic_notifier_call_chain(&hci_notifier, event, hdev); } /* ---- HCI requests ---- */ diff --git a/net/core/dev.c b/net/core/dev.c index 8e1dc305122..a3ab11f3415 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -193,7 +193,7 @@ static inline struct hlist_head *dev_index_hash(int ifindex) * Our notifier list */ -static struct notifier_block *netdev_chain; +static BLOCKING_NOTIFIER_HEAD(netdev_chain); /* * Device drivers call our routines to queue packets here. We empty the @@ -736,7 +736,8 @@ int dev_change_name(struct net_device *dev, char *newname) if (!err) { hlist_del(&dev->name_hlist); hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name)); - notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev); + blocking_notifier_call_chain(&netdev_chain, + NETDEV_CHANGENAME, dev); } return err; @@ -750,7 +751,7 @@ int dev_change_name(struct net_device *dev, char *newname) */ void netdev_features_change(struct net_device *dev) { - notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev); } EXPORT_SYMBOL(netdev_features_change); @@ -765,7 +766,8 @@ EXPORT_SYMBOL(netdev_features_change); void netdev_state_change(struct net_device *dev) { if (dev->flags & IFF_UP) { - notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev); + blocking_notifier_call_chain(&netdev_chain, + NETDEV_CHANGE, dev); rtmsg_ifinfo(RTM_NEWLINK, dev, 0); } } @@ -862,7 +864,7 @@ int dev_open(struct net_device *dev) /* * ... and announce new interface. */ - notifier_call_chain(&netdev_chain, NETDEV_UP, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_UP, dev); } return ret; } @@ -885,7 +887,7 @@ int dev_close(struct net_device *dev) * Tell people we are going down, so that they can * prepare to death, when device is still operating. */ - notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev); dev_deactivate(dev); @@ -922,7 +924,7 @@ int dev_close(struct net_device *dev) /* * Tell people we are down */ - notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev); return 0; } @@ -953,7 +955,7 @@ int register_netdevice_notifier(struct notifier_block *nb) int err; rtnl_lock(); - err = notifier_chain_register(&netdev_chain, nb); + err = blocking_notifier_chain_register(&netdev_chain, nb); if (!err) { for (dev = dev_base; dev; dev = dev->next) { nb->notifier_call(nb, NETDEV_REGISTER, dev); @@ -981,7 +983,7 @@ int unregister_netdevice_notifier(struct notifier_block *nb) int err; rtnl_lock(); - err = notifier_chain_unregister(&netdev_chain, nb); + err = blocking_notifier_chain_unregister(&netdev_chain, nb); rtnl_unlock(); return err; } @@ -992,12 +994,12 @@ int unregister_netdevice_notifier(struct notifier_block *nb) * @v: pointer passed unmodified to notifier function * * Call all network notifier blocks. Parameters and return value - * are as for notifier_call_chain(). + * are as for blocking_notifier_call_chain(). */ int call_netdevice_notifiers(unsigned long val, void *v) { - return notifier_call_chain(&netdev_chain, val, v); + return blocking_notifier_call_chain(&netdev_chain, val, v); } /* When > 0 there are consumers of rx skb time stamps */ @@ -2242,7 +2244,8 @@ int dev_change_flags(struct net_device *dev, unsigned flags) if (dev->flags & IFF_UP && ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI | IFF_VOLATILE))) - notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev); + blocking_notifier_call_chain(&netdev_chain, + NETDEV_CHANGE, dev); if ((flags ^ dev->gflags) & IFF_PROMISC) { int inc = (flags & IFF_PROMISC) ? +1 : -1; @@ -2286,8 +2289,8 @@ int dev_set_mtu(struct net_device *dev, int new_mtu) else dev->mtu = new_mtu; if (!err && dev->flags & IFF_UP) - notifier_call_chain(&netdev_chain, - NETDEV_CHANGEMTU, dev); + blocking_notifier_call_chain(&netdev_chain, + NETDEV_CHANGEMTU, dev); return err; } @@ -2303,7 +2306,8 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa) return -ENODEV; err = dev->set_mac_address(dev, sa); if (!err) - notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev); + blocking_notifier_call_chain(&netdev_chain, + NETDEV_CHANGEADDR, dev); return err; } @@ -2359,7 +2363,7 @@ static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd) return -EINVAL; memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len)); - notifier_call_chain(&netdev_chain, + blocking_notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev); return 0; @@ -2813,7 +2817,7 @@ int register_netdevice(struct net_device *dev) write_unlock_bh(&dev_base_lock); /* Notify protocols, that a new device appeared. */ - notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev); /* Finish registration after unlock */ net_set_todo(dev); @@ -2892,7 +2896,7 @@ static void netdev_wait_allrefs(struct net_device *dev) rtnl_lock(); /* Rebroadcast unregister notification */ - notifier_call_chain(&netdev_chain, + blocking_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev); if (test_bit(__LINK_STATE_LINKWATCH_PENDING, @@ -3148,7 +3152,7 @@ int unregister_netdevice(struct net_device *dev) /* Notify protocols, that we are about to destroy this device. They should clean all the things. */ - notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev); + blocking_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev); /* * Flush the multicast chain diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c index cc7b9d9255e..d2ae9893ca1 100644 --- a/net/decnet/dn_dev.c +++ b/net/decnet/dn_dev.c @@ -68,7 +68,7 @@ __le16 decnet_address = 0; static DEFINE_RWLOCK(dndev_lock); static struct net_device *decnet_default_device; -static struct notifier_block *dnaddr_chain; +static BLOCKING_NOTIFIER_HEAD(dnaddr_chain); static struct dn_dev *dn_dev_create(struct net_device *dev, int *err); static void dn_dev_delete(struct net_device *dev); @@ -446,7 +446,7 @@ static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr **ifap, int de } rtmsg_ifa(RTM_DELADDR, ifa1); - notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); + blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1); if (destroy) { dn_dev_free_ifa(ifa1); @@ -481,7 +481,7 @@ static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa) dn_db->ifa_list = ifa; rtmsg_ifa(RTM_NEWADDR, ifa); - notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); + blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa); return 0; } @@ -1285,12 +1285,12 @@ void dn_dev_devices_on(void) int register_dnaddr_notifier(struct notifier_block *nb) { - return notifier_chain_register(&dnaddr_chain, nb); + return blocking_notifier_chain_register(&dnaddr_chain, nb); } int unregister_dnaddr_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&dnaddr_chain, nb); + return blocking_notifier_chain_unregister(&dnaddr_chain, nb); } #ifdef CONFIG_PROC_FS diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c index 44fdf1413e2..81c2f788529 100644 --- a/net/ipv4/devinet.c +++ b/net/ipv4/devinet.c @@ -81,7 +81,7 @@ static struct ipv4_devconf ipv4_devconf_dflt = { static void rtmsg_ifa(int event, struct in_ifaddr *); -static struct notifier_block *inetaddr_chain; +static BLOCKING_NOTIFIER_HEAD(inetaddr_chain); static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, int destroy); #ifdef CONFIG_SYSCTL @@ -267,7 +267,8 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, *ifap1 = ifa->ifa_next; rtmsg_ifa(RTM_DELADDR, ifa); - notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa); + blocking_notifier_call_chain(&inetaddr_chain, + NETDEV_DOWN, ifa); inet_free_ifa(ifa); } else { promote = ifa; @@ -291,7 +292,7 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, So that, this order is correct. */ rtmsg_ifa(RTM_DELADDR, ifa1); - notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); + blocking_notifier_call_chain(&inetaddr_chain, NETDEV_DOWN, ifa1); if (promote) { @@ -303,7 +304,8 @@ static void inet_del_ifa(struct in_device *in_dev, struct in_ifaddr **ifap, promote->ifa_flags &= ~IFA_F_SECONDARY; rtmsg_ifa(RTM_NEWADDR, promote); - notifier_call_chain(&inetaddr_chain, NETDEV_UP, promote); + blocking_notifier_call_chain(&inetaddr_chain, + NETDEV_UP, promote); for (ifa = promote->ifa_next; ifa; ifa = ifa->ifa_next) { if (ifa1->ifa_mask != ifa->ifa_mask || !inet_ifa_match(ifa1->ifa_address, ifa)) @@ -366,7 +368,7 @@ static int inet_insert_ifa(struct in_ifaddr *ifa) Notifier will trigger FIB update, so that listeners of netlink will know about new ifaddr */ rtmsg_ifa(RTM_NEWADDR, ifa); - notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); + blocking_notifier_call_chain(&inetaddr_chain, NETDEV_UP, ifa); return 0; } @@ -938,12 +940,12 @@ u32 inet_confirm_addr(const struct net_device *dev, u32 dst, u32 local, int scop int register_inetaddr_notifier(struct notifier_block *nb) { - return notifier_chain_register(&inetaddr_chain, nb); + return blocking_notifier_chain_register(&inetaddr_chain, nb); } int unregister_inetaddr_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&inetaddr_chain, nb); + return blocking_notifier_chain_unregister(&inetaddr_chain, nb); } /* Rename ifa_labels for a device name change. Make some effort to preserve existing diff --git a/net/ipv4/netfilter/ip_conntrack_core.c b/net/ipv4/netfilter/ip_conntrack_core.c index 9e34034729a..ceaabc18202 100644 --- a/net/ipv4/netfilter/ip_conntrack_core.c +++ b/net/ipv4/netfilter/ip_conntrack_core.c @@ -80,8 +80,8 @@ static int ip_conntrack_vmalloc; static unsigned int ip_conntrack_next_id; static unsigned int ip_conntrack_expect_next_id; #ifdef CONFIG_IP_NF_CONNTRACK_EVENTS -struct notifier_block *ip_conntrack_chain; -struct notifier_block *ip_conntrack_expect_chain; +ATOMIC_NOTIFIER_HEAD(ip_conntrack_chain); +ATOMIC_NOTIFIER_HEAD(ip_conntrack_expect_chain); DEFINE_PER_CPU(struct ip_conntrack_ecache, ip_conntrack_ecache); @@ -92,7 +92,7 @@ __ip_ct_deliver_cached_events(struct ip_conntrack_ecache *ecache) { DEBUGP("ecache: delivering events for %p\n", ecache->ct); if (is_confirmed(ecache->ct) && !is_dying(ecache->ct) && ecache->events) - notifier_call_chain(&ip_conntrack_chain, ecache->events, + atomic_notifier_call_chain(&ip_conntrack_chain, ecache->events, ecache->ct); ecache->events = 0; ip_conntrack_put(ecache->ct); diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 01c62a0d374..445006ee452 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -143,7 +143,7 @@ static void inet6_prefix_notify(int event, struct inet6_dev *idev, struct prefix_info *pinfo); static int ipv6_chk_same_addr(const struct in6_addr *addr, struct net_device *dev); -static struct notifier_block *inet6addr_chain; +static ATOMIC_NOTIFIER_HEAD(inet6addr_chain); struct ipv6_devconf ipv6_devconf = { .forwarding = 0, @@ -593,7 +593,7 @@ out2: read_unlock_bh(&addrconf_lock); if (likely(err == 0)) - notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); + atomic_notifier_call_chain(&inet6addr_chain, NETDEV_UP, ifa); else { kfree(ifa); ifa = ERR_PTR(err); @@ -688,7 +688,7 @@ static void ipv6_del_addr(struct inet6_ifaddr *ifp) ipv6_ifa_notify(RTM_DELADDR, ifp); - notifier_call_chain(&inet6addr_chain,NETDEV_DOWN,ifp); + atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp); addrconf_del_timer(ifp); @@ -3767,12 +3767,12 @@ static void addrconf_sysctl_unregister(struct ipv6_devconf *p) int register_inet6addr_notifier(struct notifier_block *nb) { - return notifier_chain_register(&inet6addr_chain, nb); + return atomic_notifier_chain_register(&inet6addr_chain, nb); } int unregister_inet6addr_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&inet6addr_chain,nb); + return atomic_notifier_chain_unregister(&inet6addr_chain,nb); } /* diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 0ae281d9bfc..56389c83557 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -90,8 +90,8 @@ static int nf_conntrack_vmalloc; static unsigned int nf_conntrack_next_id; static unsigned int nf_conntrack_expect_next_id; #ifdef CONFIG_NF_CONNTRACK_EVENTS -struct notifier_block *nf_conntrack_chain; -struct notifier_block *nf_conntrack_expect_chain; +ATOMIC_NOTIFIER_HEAD(nf_conntrack_chain); +ATOMIC_NOTIFIER_HEAD(nf_conntrack_expect_chain); DEFINE_PER_CPU(struct nf_conntrack_ecache, nf_conntrack_ecache); @@ -103,7 +103,7 @@ __nf_ct_deliver_cached_events(struct nf_conntrack_ecache *ecache) DEBUGP("ecache: delivering events for %p\n", ecache->ct); if (nf_ct_is_confirmed(ecache->ct) && !nf_ct_is_dying(ecache->ct) && ecache->events) - notifier_call_chain(&nf_conntrack_chain, ecache->events, + atomic_notifier_call_chain(&nf_conntrack_chain, ecache->events, ecache->ct); ecache->events = 0; diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index d00a9034cb5..2a233ffcf61 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -123,7 +123,7 @@ static void netlink_destroy_callback(struct netlink_callback *cb); static DEFINE_RWLOCK(nl_table_lock); static atomic_t nl_table_users = ATOMIC_INIT(0); -static struct notifier_block *netlink_chain; +static ATOMIC_NOTIFIER_HEAD(netlink_chain); static u32 netlink_group_mask(u32 group) { @@ -469,7 +469,8 @@ static int netlink_release(struct socket *sock) .protocol = sk->sk_protocol, .pid = nlk->pid, }; - notifier_call_chain(&netlink_chain, NETLINK_URELEASE, &n); + atomic_notifier_call_chain(&netlink_chain, + NETLINK_URELEASE, &n); } if (nlk->module) @@ -1695,12 +1696,12 @@ static struct file_operations netlink_seq_fops = { int netlink_register_notifier(struct notifier_block *nb) { - return notifier_chain_register(&netlink_chain, nb); + return atomic_notifier_chain_register(&netlink_chain, nb); } int netlink_unregister_notifier(struct notifier_block *nb) { - return notifier_chain_unregister(&netlink_chain, nb); + return atomic_notifier_chain_unregister(&netlink_chain, nb); } static const struct proto_ops netlink_ops = { -- cgit v1.2.3-70-g09d2 From f83ca9fe3ee390755f18b4a7780c25ce593b484a Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Tue, 28 Mar 2006 01:56:20 -0800 Subject: [PATCH] symversion warning fix gcc-4.2: kernel/module.c: In function '__find_symbol': kernel/module.c:158: warning: the address of '__start___kcrctab', will always evaluate as 'true' kernel/module.c:165: warning: the address of '__start___kcrctab_gpl', will always evaluate as 'true' kernel/module.c:182: warning: the address of '__start___kcrctab_gpl_future', will always evaluate as 'true' Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/module.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/module.c') diff --git a/kernel/module.c b/kernel/module.c index 4fafd58038a..bd088a7c149 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -127,7 +127,7 @@ extern const unsigned long __start___kcrctab_gpl_future[]; #ifndef CONFIG_MODVERSIONS #define symversion(base, idx) NULL #else -#define symversion(base, idx) ((base) ? ((base) + (idx)) : NULL) +#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL) #endif /* lookup symbol in given range of kernel_symbols */ -- cgit v1.2.3-70-g09d2