Merge rsync://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

Conflicts:

	include/linux/kernel.h

10 files changed, 83 insertions, 195 deletions

diff --git a/init/Kconfig b/init/Kconfig
index 3b36a1d5365..a5b073a103e 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1,3 +1,11 @@
+config DEFCONFIG_LIST
+	string
+	option defconfig_list
+	default "/lib/modules/$UNAME_RELEASE/.config"
+	default "/etc/kernel-config"
+	default "/boot/config-$UNAME_RELEASE"
+	default "arch/$ARCH/defconfig"
+
 menu "Code maturity level options"
 
 config EXPERIMENTAL
@@ -46,8 +54,8 @@ config LOCK_KERNEL
 
 config INIT_ENV_ARG_LIMIT
 	int
-	default 32 if !USERMODE
-	default 128 if USERMODE
+	default 32 if !UML
+	default 128 if UML
 	help
 	  Maximum of each of the number of arguments and environment
 	  variables passed to init from the kernel command line.
@@ -151,7 +159,8 @@ config BSD_PROCESS_ACCT_V3
 	  at <http://www.physik3.uni-rostock.de/tim/kernel/utils/acct/>.
 
 config SYSCTL
-	bool "Sysctl support"
+	bool "Sysctl support" if EMBEDDED
+	default y
 	---help---
 	  The sysctl interface provides a means of dynamically changing
 	  certain kernel parameters and variables on the fly without requiring
@@ -182,7 +191,8 @@ config AUDITSYSCALL
 	help
 	  Enable low-overhead system-call auditing infrastructure that
 	  can be used independently or with another kernel subsystem,
-	  such as SELinux.
+	  such as SELinux.  To use audit's filesystem watch feature, please
+	  ensure that INOTIFY is configured.
 
 config IKCONFIG
 	bool "Kernel .config support"
@@ -234,16 +244,6 @@ config UID16
 	help
 	  This enables the legacy 16-bit UID syscall wrappers.
 
-config VM86
-	depends X86
-	default y
-	bool "Enable VM86 support" if EMBEDDED
-	help
-          This option is required by programs like DOSEMU to run 16-bit legacy
-	  code on X86 processors. It also may be needed by software like
-          XFree86 to initialize some video cards via BIOS. Disabling this
-          option saves about 6k.
-
 config CC_OPTIMIZE_FOR_SIZE
 	bool "Optimize for size (Look out for broken compilers!)"
 	default y
@@ -339,9 +339,14 @@ config BASE_FULL
 	  kernel data structures. This saves memory on small machines,
 	  but may reduce performance.
 
+config RT_MUTEXES
+	boolean
+	select PLIST
+
 config FUTEX
 	bool "Enable futex support" if EMBEDDED
 	default y
+	select RT_MUTEXES
 	help
 	  Disabling this option will cause the kernel to be built without
 	  support for "fast userspace mutexes".  The resulting kernel may not
@@ -374,6 +379,15 @@ config SLAB
 	  SLOB is more space efficient but does not scale well and is
 	  more susceptible to fragmentation.
 
+config VM_EVENT_COUNTERS
+	default y
+	bool "Enable VM event counters for /proc/vmstat" if EMBEDDED
+	help
+	  VM event counters are only needed to for event counts to be
+	  shown. They have no function for the kernel itself. This
+	  option allows the disabling of the VM event counters.
+	  /proc/vmstat will only show page counts.
+
 endmenu		# General setup
 
 config TINY_SHMEM
@@ -389,9 +403,6 @@ config SLOB
 	default !SLAB
 	bool
 
-config OBSOLETE_INTERMODULE
-	tristate
-
 menu "Loadable module support"
 
 config MODULES
diff --git a/init/Makefile b/init/Makefile
index a2300078f2b..633a268d270 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -6,7 +6,6 @@ obj-y				:= main.o version.o mounts.o initramfs.o
 obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
 
 mounts-y			:= do_mounts.o
-mounts-$(CONFIG_DEVFS_FS)	+= do_mounts_devfs.o
 mounts-$(CONFIG_BLK_DEV_RAM)	+= do_mounts_rd.o
 mounts-$(CONFIG_BLK_DEV_INITRD)	+= do_mounts_initrd.o
 mounts-$(CONFIG_BLK_DEV_MD)	+= do_mounts_md.o
diff --git a/init/do_mounts.c b/init/do_mounts.c
index f4b7b9d278c..94aeec7aa91 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -325,7 +325,7 @@ static int __init mount_nfs_root(void)
 {
 	void *data = nfs_root_data();
 
-	create_dev("/dev/root", ROOT_DEV, NULL);
+	create_dev("/dev/root", ROOT_DEV);
 	if (data &&
 	    do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
 		return 1;
@@ -386,7 +386,7 @@ void __init mount_root(void)
 			change_floppy("root floppy");
 	}
 #endif
-	create_dev("/dev/root", ROOT_DEV, root_device_name);
+	create_dev("/dev/root", ROOT_DEV);
 	mount_block_root("/dev/root", root_mountflags);
 }
 
@@ -397,8 +397,6 @@ void __init prepare_namespace(void)
 {
 	int is_floppy;
 
-	mount_devfs();
-
 	if (root_delay) {
 		printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
 		       root_delay);
@@ -409,6 +407,10 @@ void __init prepare_namespace(void)
 
 	if (saved_root_name[0]) {
 		root_device_name = saved_root_name;
+		if (!strncmp(root_device_name, "mtd", 3)) {
+			mount_block_root(root_device_name, root_mountflags);
+			goto out;
+		}
 		ROOT_DEV = name_to_dev_t(root_device_name);
 		if (strncmp(root_device_name, "/dev/", 5) == 0)
 			root_device_name += 5;
@@ -424,10 +426,8 @@ void __init prepare_namespace(void)
 
 	mount_root();
 out:
-	umount_devfs("/dev");
 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
 	sys_chroot(".");
 	security_sb_post_mountroot();
-	mount_devfs_fs ();
 }
 
diff --git a/init/do_mounts.h b/init/do_mounts.h
index e0a7ac9649e..e7f2e7fa066 100644
--- a/init/do_mounts.h
+++ b/init/do_mounts.h
@@ -1,6 +1,5 @@
 #include <linux/config.h>
 #include <linux/kernel.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/init.h>
 #include <linux/syscalls.h>
 #include <linux/unistd.h>
@@ -15,25 +14,12 @@ void  mount_root(void);
 extern int root_mountflags;
 extern char *root_device_name;
 
-#ifdef CONFIG_DEVFS_FS
-
-void mount_devfs(void);
-void umount_devfs(char *path);
-int  create_dev(char *name, dev_t dev, char *devfs_name);
-
-#else
-
-static inline void mount_devfs(void) {}
-static inline void umount_devfs(const char *path) {}
-
-static inline int create_dev(char *name, dev_t dev, char *devfs_name)
+static inline int create_dev(char *name, dev_t dev)
 {
 	sys_unlink(name);
 	return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
 }
 
-#endif
-
 #if BITS_PER_LONG == 32
 static inline u32 bstat(char *name)
 {
diff --git a/init/do_mounts_devfs.c b/init/do_mounts_devfs.c
deleted file mode 100644
index cc526474690..00000000000
--- a/init/do_mounts_devfs.c
+++ /dev/null
@@ -1,137 +0,0 @@
-
-#include <linux/kernel.h>
-#include <linux/dirent.h>
-#include <linux/string.h>
-
-#include "do_mounts.h"
-
-void __init mount_devfs(void)
-{
-	sys_mount("devfs", "/dev", "devfs", 0, NULL);
-}
-
-void __init umount_devfs(char *path)
-{
-	sys_umount(path, 0);
-}
-
-/*
- * If the dir will fit in *buf, return its length.  If it won't fit, return
- * zero.  Return -ve on error.
- */
-static int __init do_read_dir(int fd, void *buf, int len)
-{
-	long bytes, n;
-	char *p = buf;
-	sys_lseek(fd, 0, 0);
-
-	for (bytes = 0; bytes < len; bytes += n) {
-		n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes),
-					len - bytes);
-		if (n < 0)
-			return n;
-		if (n == 0)
-			return bytes;
-	}
-	return 0;
-}
-
-/*
- * Try to read all of a directory.  Returns the contents at *p, which
- * is kmalloced memory.  Returns the number of bytes read at *len.  Returns
- * NULL on error.
- */
-static void * __init read_dir(char *path, int *len)
-{
-	int size;
-	int fd = sys_open(path, 0, 0);
-
-	*len = 0;
-	if (fd < 0)
-		return NULL;
-
-	for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) {
-		void *p = kmalloc(size, GFP_KERNEL);
-		int n;
-		if (!p)
-			break;
-		n = do_read_dir(fd, p, size);
-		if (n > 0) {
-			sys_close(fd);
-			*len = n;
-			return p;
-		}
-		kfree(p);
-		if (n == -EINVAL)
-			continue;	/* Try a larger buffer */
-		if (n < 0)
-			break;
-	}
-	sys_close(fd);
-	return NULL;
-}
-
-/*
- * recursively scan <path>, looking for a device node of type <dev>
- */
-static int __init find_in_devfs(char *path, unsigned dev)
-{
-	char *end = path + strlen(path);
-	int rest = path + 64 - end;
-	int size;
-	char *p = read_dir(path, &size);
-	char *s;
-
-	if (!p)
-		return -1;
-	for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) {
-		struct linux_dirent64 *d = (struct linux_dirent64 *)s;
-		if (strlen(d->d_name) + 2 > rest)
-			continue;
-		switch (d->d_type) {
-			case DT_BLK:
-				sprintf(end, "/%s", d->d_name);
-				if (bstat(path) != dev)
-					break;
-				kfree(p);
-				return 0;
-			case DT_DIR:
-				if (strcmp(d->d_name, ".") == 0)
-					break;
-				if (strcmp(d->d_name, "..") == 0)
-					break;
-				sprintf(end, "/%s", d->d_name);
-				if (find_in_devfs(path, dev) < 0)
-					break;
-				kfree(p);
-				return 0;
-		}
-	}
-	kfree(p);
-	return -1;
-}
-
-/*
- * create a device node called <name> which points to
- * <devfs_name> if possible, otherwise find a device node
- * which matches <dev> and make <name> a symlink pointing to it.
- */
-int __init create_dev(char *name, dev_t dev, char *devfs_name)
-{
-	char path[64];
-
-	sys_unlink(name);
-	if (devfs_name && devfs_name[0]) {
-		if (strncmp(devfs_name, "/dev/", 5) == 0)
-			devfs_name += 5;
-		sprintf(path, "/dev/%s", devfs_name);
-		if (sys_access(path, 0) == 0)
-			return sys_symlink(devfs_name, name);
-	}
-	if (!dev)
-		return -1;
-	strcpy(path, "/dev");
-	if (find_in_devfs(path, new_encode_dev(dev)) < 0)
-		return -1;
-	return sys_symlink(path + 5, name);
-}
diff --git a/init/do_mounts_initrd.c b/init/do_mounts_initrd.c
index 405f9031af8..a06f037fa00 100644
--- a/init/do_mounts_initrd.c
+++ b/init/do_mounts_initrd.c
@@ -44,7 +44,7 @@ static void __init handle_initrd(void)
 	int pid;
 
 	real_root_dev = new_encode_dev(ROOT_DEV);
-	create_dev("/dev/root.old", Root_RAM0, NULL);
+	create_dev("/dev/root.old", Root_RAM0);
 	/* mount initrd on rootfs' /root */
 	mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
 	sys_mkdir("/old", 0700);
@@ -54,7 +54,6 @@ static void __init handle_initrd(void)
 	sys_chdir("/root");
 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
 	sys_chroot(".");
-	mount_devfs_fs ();
 
 	current->flags |= PF_NOFREEZE;
 	pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
@@ -71,7 +70,6 @@ static void __init handle_initrd(void)
 	sys_chroot(".");
 	sys_close(old_fd);
 	sys_close(root_fd);
-	umount_devfs("/old/dev");
 
 	if (new_decode_dev(real_root_dev) == Root_RAM0) {
 		sys_chdir("/old");
@@ -107,7 +105,7 @@ static void __init handle_initrd(void)
 int __init initrd_load(void)
 {
 	if (mount_initrd) {
-		create_dev("/dev/ram", Root_RAM0, NULL);
+		create_dev("/dev/ram", Root_RAM0);
 		/*
 		 * Load the initrd data into /dev/ram0. Execute it as initrd
 		 * unless /dev/ram0 is supposed to be our actual root device,
diff --git a/init/do_mounts_md.c b/init/do_mounts_md.c
index f6f36806f84..2429e1bf8c6 100644
--- a/init/do_mounts_md.c
+++ b/init/do_mounts_md.c
@@ -125,19 +125,18 @@ static void __init md_setup_drive(void)
 		int err = 0;
 		char *devname;
 		mdu_disk_info_t dinfo;
-		char name[16], devfs_name[16];
+		char name[16];
 
 		minor = md_setup_args[ent].minor;
 		partitioned = md_setup_args[ent].partitioned;
 		devname = md_setup_args[ent].device_names;
 
 		sprintf(name, "/dev/md%s%d", partitioned?"_d":"", minor);
-		sprintf(devfs_name, "/dev/md/%s%d", partitioned?"d":"", minor);
 		if (partitioned)
 			dev = MKDEV(mdp_major, minor << MdpMinorShift);
 		else
 			dev = MKDEV(MD_MAJOR, minor);
-		create_dev(name, dev, devfs_name);
+		create_dev(name, dev);
 		for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
 			char *p;
 			char comp_name[64];
@@ -272,7 +271,7 @@ __setup("md=", md_setup);
 
 void __init md_run_setup(void)
 {
-	create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0");
+	create_dev("/dev/md0", MKDEV(MD_MAJOR, 0));
 	if (raid_noautodetect)
 		printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
 	else {
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index c2683fcd792..ed652f40f07 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -262,8 +262,8 @@ int __init rd_load_disk(int n)
 {
 	if (rd_prompt)
 		change_floppy("root floppy disk to be loaded into RAM disk");
-	create_dev("/dev/root", ROOT_DEV, root_device_name);
-	create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n), NULL);
+	create_dev("/dev/root", ROOT_DEV);
+	create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n));
 	return rd_load_image("/dev/root");
 }
 
diff --git a/init/initramfs.c b/init/initramfs.c
index f81cfa40a71..d28c1094d7e 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -30,6 +30,7 @@ static void __init free(void *where)
 
 static __initdata struct hash {
 	int ino, minor, major;
+	mode_t mode;
 	struct hash *next;
 	char name[N_ALIGN(PATH_MAX)];
 } *head[32];
@@ -41,7 +42,8 @@ static inline int hash(int major, int minor, int ino)
 	return tmp & 31;
 }
 
-static char __init *find_link(int major, int minor, int ino, char *name)
+static char __init *find_link(int major, int minor, int ino,
+			      mode_t mode, char *name)
 {
 	struct hash **p, *q;
 	for (p = head + hash(major, minor, ino); *p; p = &(*p)->next) {
@@ -51,14 +53,17 @@ static char __init *find_link(int major, int minor, int ino, char *name)
 			continue;
 		if ((*p)->major != major)
 			continue;
+		if (((*p)->mode ^ mode) & S_IFMT)
+			continue;
 		return (*p)->name;
 	}
 	q = (struct hash *)malloc(sizeof(struct hash));
 	if (!q)
 		panic("can't allocate link hash entry");
-	q->ino = ino;
-	q->minor = minor;
 	q->major = major;
+	q->minor = minor;
+	q->ino = ino;
+	q->mode = mode;
 	strcpy(q->name, name);
 	q->next = NULL;
 	*p = q;
@@ -229,13 +234,25 @@ static int __init do_reset(void)
 static int __init maybe_link(void)
 {
 	if (nlink >= 2) {
-		char *old = find_link(major, minor, ino, collected);
+		char *old = find_link(major, minor, ino, mode, collected);
 		if (old)
 			return (sys_link(old, collected) < 0) ? -1 : 1;
 	}
 	return 0;
 }
 
+static void __init clean_path(char *path, mode_t mode)
+{
+	struct stat st;
+
+	if (!sys_newlstat(path, &st) && (st.st_mode^mode) & S_IFMT) {
+		if (S_ISDIR(st.st_mode))
+			sys_rmdir(path);
+		else
+			sys_unlink(path);
+	}
+}
+
 static __initdata int wfd;
 
 static int __init do_name(void)
@@ -248,9 +265,15 @@ static int __init do_name(void)
 	}
 	if (dry_run)
 		return 0;
+	clean_path(collected, mode);
 	if (S_ISREG(mode)) {
-		if (maybe_link() >= 0) {
-			wfd = sys_open(collected, O_WRONLY|O_CREAT, mode);
+		int ml = maybe_link();
+		if (ml >= 0) {
+			int openflags = O_WRONLY|O_CREAT;
+			if (ml != 1)
+				openflags |= O_TRUNC;
+			wfd = sys_open(collected, openflags, mode);
+
 			if (wfd >= 0) {
 				sys_fchown(wfd, uid, gid);
 				sys_fchmod(wfd, mode);
@@ -291,6 +314,7 @@ static int __init do_copy(void)
 static int __init do_symlink(void)
 {
 	collected[N_ALIGN(name_len) + body_len] = '\0';
+	clean_path(collected, 0);
 	sys_symlink(collected + N_ALIGN(name_len), collected);
 	sys_lchown(collected, uid, gid);
 	state = SkipIt;
diff --git a/init/main.c b/init/main.c
index f715b9b8975..b2f3b566790 100644
--- a/init/main.c
+++ b/init/main.c
@@ -11,11 +11,9 @@
 
 #define __KERNEL_SYSCALLS__
 
-#include <linux/config.h>
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
-#include <linux/devfs_fs_kernel.h>
 #include <linux/kernel.h>
 #include <linux/syscalls.h>
 #include <linux/string.h>
@@ -47,6 +45,8 @@
 #include <linux/rmap.h>
 #include <linux/mempolicy.h>
 #include <linux/key.h>
+#include <linux/unwind.h>
+#include <linux/buffer_head.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -79,7 +79,6 @@ extern void mca_init(void);
 extern void sbus_init(void);
 extern void sysctl_init(void);
 extern void signals_init(void);
-extern void buffer_init(void);
 extern void pidhash_init(void);
 extern void pidmap_init(void);
 extern void prio_tree_init(void);
@@ -446,10 +445,17 @@ static void __init boot_cpu_init(void)
 	cpu_set(cpu, cpu_possible_map);
 }
 
+void __init __attribute__((weak)) smp_setup_processor_id(void)
+{
+}
+
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
 	extern struct kernel_param __start___param[], __stop___param[];
+
+	smp_setup_processor_id();
+
 /*
  * Interrupts are still disabled. Do necessary setups, then
  * enable them
@@ -482,6 +488,7 @@ asmlinkage void __init start_kernel(void)
 		   __stop___param - __start___param,
 		   &unknown_bootoption);
 	sort_main_extable();
+	unwind_init();
 	trap_init();
 	rcu_init();
 	init_IRQ();
@@ -490,6 +497,7 @@ asmlinkage void __init start_kernel(void)
 	hrtimers_init();
 	softirq_init();
 	time_init();
+	timekeeping_init();
 
 	/*
 	 * HACK ALERT! This is early. We're enabling the console before