Merge commit 'v2.6.34-rc1' into for-2.6.35

1 files changed, 18 insertions, 163 deletions

diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index 86639beac3a..c3d86fa71dd 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -24,11 +24,10 @@
 #include <linux/kdebug.h>
 #include <linux/kexec.h>
 #include <linux/limits.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
 #include <linux/sysfs.h>
+#include <linux/uaccess.h>
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <asm/alignment.h>
 #include <asm/fpu.h>
 #include <asm/kprobes.h>
 
@@ -47,73 +46,6 @@
 #define TRAP_ILLEGAL_SLOT_INST	13
 #endif
 
-static unsigned long se_user;
-static unsigned long se_sys;
-static unsigned long se_half;
-static unsigned long se_word;
-static unsigned long se_dword;
-static unsigned long se_multi;
-/* bitfield: 1: warn 2: fixup 4: signal -> combinations 2|4 && 1|2|4 are not
-   valid! */
-static int se_usermode = 3;
-/* 0: no warning 1: print a warning message, disabled by default */
-static int se_kernmode_warn;
-
-#ifdef CONFIG_PROC_FS
-static const char *se_usermode_action[] = {
-	"ignored",
-	"warn",
-	"fixup",
-	"fixup+warn",
-	"signal",
-	"signal+warn"
-};
-
-static int alignment_proc_show(struct seq_file *m, void *v)
-{
-	seq_printf(m, "User:\t\t%lu\n", se_user);
-	seq_printf(m, "System:\t\t%lu\n", se_sys);
-	seq_printf(m, "Half:\t\t%lu\n", se_half);
-	seq_printf(m, "Word:\t\t%lu\n", se_word);
-	seq_printf(m, "DWord:\t\t%lu\n", se_dword);
-	seq_printf(m, "Multi:\t\t%lu\n", se_multi);
-	seq_printf(m, "User faults:\t%i (%s)\n", se_usermode,
-			se_usermode_action[se_usermode]);
-	seq_printf(m, "Kernel faults:\t%i (fixup%s)\n", se_kernmode_warn,
-			se_kernmode_warn ? "+warn" : "");
-	return 0;
-}
-
-static int alignment_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, alignment_proc_show, NULL);
-}
-
-static ssize_t alignment_proc_write(struct file *file,
-		const char __user *buffer, size_t count, loff_t *pos)
-{
-	int *data = PDE(file->f_path.dentry->d_inode)->data;
-	char mode;
-
-	if (count > 0) {
-		if (get_user(mode, buffer))
-			return -EFAULT;
-		if (mode >= '0' && mode <= '5')
-			*data = mode - '0';
-	}
-	return count;
-}
-
-static const struct file_operations alignment_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= alignment_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.write		= alignment_proc_write,
-};
-#endif
-
 static void dump_mem(const char *str, unsigned long bottom, unsigned long top)
 {
 	unsigned long p;
@@ -265,10 +197,10 @@ static int handle_unaligned_ins(insn_size_t instruction, struct pt_regs *regs,
 	count = 1<<(instruction&3);
 
 	switch (count) {
-	case 1: se_half  += 1; break;
-	case 2: se_word  += 1; break;
-	case 4: se_dword += 1; break;
-	case 8: se_multi += 1; break; /* ??? */
+	case 1: inc_unaligned_byte_access(); break;
+	case 2: inc_unaligned_word_access(); break;
+	case 4: inc_unaligned_dword_access(); break;
+	case 8: inc_unaligned_multi_access(); break;
 	}
 
 	ret = -EFAULT;
@@ -452,18 +384,8 @@ int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
 	rm = regs->regs[index];
 
 	/* shout about fixups */
-	if (!expected) {
-		if (user_mode(regs) && (se_usermode & 1) && printk_ratelimit())
-			pr_notice("Fixing up unaligned userspace access "
-				  "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-				  current->comm, task_pid_nr(current),
-				  (void *)regs->pc, instruction);
-		else if (se_kernmode_warn && printk_ratelimit())
-			pr_notice("Fixing up unaligned kernel access "
-				  "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-				  current->comm, task_pid_nr(current),
-				  (void *)regs->pc, instruction);
-	}
+	if (!expected)
+		unaligned_fixups_notify(current, instruction, regs);
 
 	ret = -EFAULT;
 	switch (instruction&0xF000) {
@@ -616,10 +538,10 @@ asmlinkage void do_address_error(struct pt_regs *regs,
 
 	if (user_mode(regs)) {
 		int si_code = BUS_ADRERR;
+		unsigned int user_action;
 
 		local_irq_enable();
-
-		se_user += 1;
+		inc_unaligned_user_access();
 
 		set_fs(USER_DS);
 		if (copy_from_user(&instruction, (insn_size_t *)(regs->pc & ~1),
@@ -630,16 +552,12 @@ asmlinkage void do_address_error(struct pt_regs *regs,
 		set_fs(oldfs);
 
 		/* shout about userspace fixups */
-		if (se_usermode & 1)
-			printk(KERN_NOTICE "Unaligned userspace access "
-			       "in \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-			       current->comm, current->pid, (void *)regs->pc,
-			       instruction);
+		unaligned_fixups_notify(current, instruction, regs);
 
-		if (se_usermode & 2)
+		user_action = unaligned_user_action();
+		if (user_action & UM_FIXUP)
 			goto fixup;
-
-		if (se_usermode & 4)
+		if (user_action & UM_SIGNAL)
 			goto uspace_segv;
 		else {
 			/* ignore */
@@ -659,7 +577,7 @@ fixup:
 					      &user_mem_access, 0);
 		set_fs(oldfs);
 
-		if (tmp==0)
+		if (tmp == 0)
 			return; /* sorted */
 uspace_segv:
 		printk(KERN_NOTICE "Sending SIGBUS to \"%s\" due to unaligned "
@@ -672,7 +590,7 @@ uspace_segv:
 		info.si_addr = (void __user *)address;
 		force_sig_info(SIGBUS, &info, current);
 	} else {
-		se_sys += 1;
+		inc_unaligned_kernel_access();
 
 		if (regs->pc & 1)
 			die("unaligned program counter", regs, error_code);
@@ -687,11 +605,7 @@ uspace_segv:
 			die("insn faulting in do_address_error", regs, 0);
 		}
 
-		if (se_kernmode_warn)
-			printk(KERN_NOTICE "Unaligned kernel access "
-			       "on behalf of \"%s\" pid=%d pc=0x%p ins=0x%04hx\n",
-			       current->comm, current->pid, (void *)regs->pc,
-			       instruction);
+		unaligned_fixups_notify(current, instruction, regs);
 
 		handle_unaligned_access(instruction, regs,
 					&user_mem_access, 0);
@@ -876,35 +790,10 @@ asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
 	die_if_kernel("exception", regs, ex);
 }
 
-#if defined(CONFIG_SH_STANDARD_BIOS)
-void *gdb_vbr_vector;
-
-static inline void __init gdb_vbr_init(void)
-{
-	register unsigned long vbr;
-
-	/*
-	 * Read the old value of the VBR register to initialise
-	 * the vector through which debug and BIOS traps are
-	 * delegated by the Linux trap handler.
-	 */
-	asm volatile("stc vbr, %0" : "=r" (vbr));
-
-	gdb_vbr_vector = (void *)(vbr + 0x100);
-	printk("Setting GDB trap vector to 0x%08lx\n",
-	       (unsigned long)gdb_vbr_vector);
-}
-#endif
-
 void __cpuinit per_cpu_trap_init(void)
 {
 	extern void *vbr_base;
 
-#ifdef CONFIG_SH_STANDARD_BIOS
-	if (raw_smp_processor_id() == 0)
-		gdb_vbr_init();
-#endif
-
 	/* NOTE: The VBR value should be at P1
 	   (or P2, virtural "fixed" address space).
 	   It's definitely should not in physical address.  */
@@ -956,11 +845,8 @@ void __init trap_init(void)
 #endif
 
 #ifdef TRAP_UBC
-	set_exception_table_vec(TRAP_UBC, break_point_trap);
+	set_exception_table_vec(TRAP_UBC, breakpoint_trap_handler);
 #endif
-
-	/* Setup VBR for boot cpu */
-	per_cpu_trap_init();
 }
 
 void show_stack(struct task_struct *tsk, unsigned long *sp)
@@ -985,34 +871,3 @@ void dump_stack(void)
 	show_stack(NULL, NULL);
 }
 EXPORT_SYMBOL(dump_stack);
-
-#ifdef CONFIG_PROC_FS
-/*
- * This needs to be done after sysctl_init, otherwise sys/ will be
- * overwritten.  Actually, this shouldn't be in sys/ at all since
- * it isn't a sysctl, and it doesn't contain sysctl information.
- * We now locate it in /proc/cpu/alignment instead.
- */
-static int __init alignment_init(void)
-{
-	struct proc_dir_entry *dir, *res;
-
-	dir = proc_mkdir("cpu", NULL);
-	if (!dir)
-		return -ENOMEM;
-
-	res = proc_create_data("alignment", S_IWUSR | S_IRUGO, dir,
-			       &alignment_proc_fops, &se_usermode);
-	if (!res)
-		return -ENOMEM;
-
-        res = proc_create_data("kernel_alignment", S_IWUSR | S_IRUGO, dir,
-			       &alignment_proc_fops, &se_kernmode_warn);
-        if (!res)
-                return -ENOMEM;
-
-	return 0;
-}
-
-fs_initcall(alignment_init);
-#endif