v2.5.0.6 -> v2.5.0.7

- Jens Axboe: more bio fixes/cleanups/breakage ;)
- Al Viro: superblock cleanups, boot/root mounting.

2 files changed, 560 insertions, 265 deletions

diff --git a/init/do_mounts.c b/init/do_mounts.c
new file mode 100644
index 000000000000..8d16e3face51
--- /dev/null
+++ b/init/do_mounts.c
@@ -0,0 +1,558 @@
+#define __KERNEL_SYSCALLS__
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/smp_lock.h>
+#include <linux/blk.h>
+#include <linux/tty.h>
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/nfs_mount.h>
+
+#include <asm/uaccess.h>
+
+/* syscalls missing from unistd.h */
+ 
+static inline _syscall2(int,mkdir,char *,name,int,mode);
+static inline _syscall1(int,chdir,char *,name);
+static inline _syscall1(int,chroot,char *,name);
+static inline _syscall1(int,unlink,char *,name);
+static inline _syscall3(int,mknod,char *,name,int,mode,dev_t,dev);
+static inline _syscall5(int,mount,char *,dev,char *,dir,char *,type,
+			unsigned long,flags,void *,data);
+static inline _syscall2(int,umount,char *,name,int,flags);
+
+extern void rd_load(void);
+extern void initrd_load(void);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+unsigned int real_root_dev;	/* do_proc_dointvec cannot handle kdev_t */
+#endif
+int root_mountflags = MS_RDONLY;
+char root_device_name[64];
+
+/* this is initialized in init/main.c */
+kdev_t ROOT_DEV;
+
+static int __init readonly(char *str)
+{
+	if (*str)
+		return 0;
+	root_mountflags |= MS_RDONLY;
+	return 1;
+}
+
+static int __init readwrite(char *str)
+{
+	if (*str)
+		return 0;
+	root_mountflags &= ~MS_RDONLY;
+	return 1;
+}
+
+__setup("ro", readonly);
+__setup("rw", readwrite);
+
+static struct dev_name_struct {
+	const char *name;
+	const int num;
+} root_dev_names[] __initdata = {
+	{ "nfs",     0x00ff },
+	{ "hda",     0x0300 },
+	{ "hdb",     0x0340 },
+	{ "loop",    0x0700 },
+	{ "hdc",     0x1600 },
+	{ "hdd",     0x1640 },
+	{ "hde",     0x2100 },
+	{ "hdf",     0x2140 },
+	{ "hdg",     0x2200 },
+	{ "hdh",     0x2240 },
+	{ "hdi",     0x3800 },
+	{ "hdj",     0x3840 },
+	{ "hdk",     0x3900 },
+	{ "hdl",     0x3940 },
+	{ "hdm",     0x5800 },
+	{ "hdn",     0x5840 },
+	{ "hdo",     0x5900 },
+	{ "hdp",     0x5940 },
+	{ "hdq",     0x5A00 },
+	{ "hdr",     0x5A40 },
+	{ "hds",     0x5B00 },
+	{ "hdt",     0x5B40 },
+	{ "sda",     0x0800 },
+	{ "sdb",     0x0810 },
+	{ "sdc",     0x0820 },
+	{ "sdd",     0x0830 },
+	{ "sde",     0x0840 },
+	{ "sdf",     0x0850 },
+	{ "sdg",     0x0860 },
+	{ "sdh",     0x0870 },
+	{ "sdi",     0x0880 },
+	{ "sdj",     0x0890 },
+	{ "sdk",     0x08a0 },
+	{ "sdl",     0x08b0 },
+	{ "sdm",     0x08c0 },
+	{ "sdn",     0x08d0 },
+	{ "sdo",     0x08e0 },
+	{ "sdp",     0x08f0 },
+	{ "ada",     0x1c00 },
+	{ "adb",     0x1c10 },
+	{ "adc",     0x1c20 },
+	{ "add",     0x1c30 },
+	{ "ade",     0x1c40 },
+	{ "fd",      0x0200 },
+	{ "md",      0x0900 },	     
+	{ "xda",     0x0d00 },
+	{ "xdb",     0x0d40 },
+	{ "ram",     0x0100 },
+	{ "scd",     0x0b00 },
+	{ "mcd",     0x1700 },
+	{ "cdu535",  0x1800 },
+	{ "sonycd",  0x1800 },
+	{ "aztcd",   0x1d00 },
+	{ "cm206cd", 0x2000 },
+	{ "gscd",    0x1000 },
+	{ "sbpcd",   0x1900 },
+	{ "eda",     0x2400 },
+	{ "edb",     0x2440 },
+	{ "pda",	0x2d00 },
+	{ "pdb",	0x2d10 },
+	{ "pdc",	0x2d20 },
+	{ "pdd",	0x2d30 },
+	{ "pcd",	0x2e00 },
+	{ "pf",		0x2f00 },
+	{ "apblock", APBLOCK_MAJOR << 8},
+	{ "ddv", DDV_MAJOR << 8},
+	{ "jsfd",    JSFD_MAJOR << 8},
+#if defined(CONFIG_ARCH_S390)
+	{ "dasda", (DASD_MAJOR << MINORBITS) },
+	{ "dasdb", (DASD_MAJOR << MINORBITS) + (1 << 2) },
+	{ "dasdc", (DASD_MAJOR << MINORBITS) + (2 << 2) },
+	{ "dasdd", (DASD_MAJOR << MINORBITS) + (3 << 2) },
+	{ "dasde", (DASD_MAJOR << MINORBITS) + (4 << 2) },
+	{ "dasdf", (DASD_MAJOR << MINORBITS) + (5 << 2) },
+	{ "dasdg", (DASD_MAJOR << MINORBITS) + (6 << 2) },
+	{ "dasdh", (DASD_MAJOR << MINORBITS) + (7 << 2) },
+#endif
+#if defined(CONFIG_BLK_CPQ_DA) || defined(CONFIG_BLK_CPQ_DA_MODULE)
+	{ "ida/c0d0p",0x4800 },
+	{ "ida/c0d1p",0x4810 },
+	{ "ida/c0d2p",0x4820 },
+	{ "ida/c0d3p",0x4830 },
+	{ "ida/c0d4p",0x4840 },
+	{ "ida/c0d5p",0x4850 },
+	{ "ida/c0d6p",0x4860 },
+	{ "ida/c0d7p",0x4870 },
+	{ "ida/c0d8p",0x4880 },
+	{ "ida/c0d9p",0x4890 },
+	{ "ida/c0d10p",0x48A0 },
+	{ "ida/c0d11p",0x48B0 },
+	{ "ida/c0d12p",0x48C0 },
+	{ "ida/c0d13p",0x48D0 },
+	{ "ida/c0d14p",0x48E0 },
+	{ "ida/c0d15p",0x48F0 },
+#endif
+#if defined(CONFIG_BLK_CPQ_CISS_DA) || defined(CONFIG_BLK_CPQ_CISS_DA_MODULE)
+	{ "cciss/c0d0p",0x6800 },
+	{ "cciss/c0d1p",0x6810 },
+	{ "cciss/c0d2p",0x6820 },
+	{ "cciss/c0d3p",0x6830 },
+	{ "cciss/c0d4p",0x6840 },
+	{ "cciss/c0d5p",0x6850 },
+	{ "cciss/c0d6p",0x6860 },
+	{ "cciss/c0d7p",0x6870 },
+	{ "cciss/c0d8p",0x6880 },
+	{ "cciss/c0d9p",0x6890 },
+	{ "cciss/c0d10p",0x68A0 },
+	{ "cciss/c0d11p",0x68B0 },
+	{ "cciss/c0d12p",0x68C0 },
+	{ "cciss/c0d13p",0x68D0 },
+	{ "cciss/c0d14p",0x68E0 },
+	{ "cciss/c0d15p",0x68F0 },
+#endif
+	{ "nftla", 0x5d00 },
+	{ "nftlb", 0x5d10 },
+	{ "nftlc", 0x5d20 },
+	{ "nftld", 0x5d30 },
+	{ "ftla", 0x2c00 },
+	{ "ftlb", 0x2c08 },
+	{ "ftlc", 0x2c10 },
+	{ "ftld", 0x2c18 },
+	{ "mtdblock", 0x1f00 },
+	{ NULL, 0 }
+};
+
+kdev_t __init name_to_kdev_t(char *line)
+{
+	int base = 0;
+
+	if (strncmp(line,"/dev/",5) == 0) {
+		struct dev_name_struct *dev = root_dev_names;
+		line += 5;
+		do {
+			int len = strlen(dev->name);
+			if (strncmp(line,dev->name,len) == 0) {
+				line += len;
+				base = dev->num;
+				break;
+			}
+			dev++;
+		} while (dev->name);
+	}
+	return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
+}
+
+static int __init root_dev_setup(char *line)
+{
+	int i;
+	char ch;
+
+	ROOT_DEV = name_to_kdev_t(line);
+	memset (root_device_name, 0, sizeof root_device_name);
+	if (strncmp (line, "/dev/", 5) == 0) line += 5;
+	for (i = 0; i < sizeof root_device_name - 1; ++i)
+	{
+	    ch = line[i];
+	    if ( isspace (ch) || (ch == ',') || (ch == '\0') ) break;
+	    root_device_name[i] = ch;
+	}
+	return 1;
+}
+
+__setup("root=", root_dev_setup);
+
+static char * __initdata root_mount_data;
+static int __init root_data_setup(char *str)
+{
+	root_mount_data = str;
+	return 1;
+}
+
+static char * __initdata root_fs_names;
+static int __init fs_names_setup(char *str)
+{
+	root_fs_names = str;
+	return 1;
+}
+
+__setup("rootflags=", root_data_setup);
+__setup("rootfstype=", fs_names_setup);
+
+static void __init get_fs_names(char *page)
+{
+	char *s = page;
+
+	if (root_fs_names) {
+		strcpy(page, root_fs_names);
+		while (*s++) {
+			if (s[-1] == ',')
+				s[-1] = '\0';
+		}
+	} else {
+		int len = get_filesystem_list(page);
+		char *p, *next;
+
+		page[len] = '\0';
+		for (p = page-1; p; p = next) {
+			next = strchr(++p, '\n');
+			if (*p++ != '\t')
+				continue;
+			while ((*s++ = *p++) != '\n')
+				;
+			s[-1] = '\0';
+		}
+	}
+	*s = '\0';
+}
+
+static void __init mount_root(void)
+{
+	void *handle;
+	char path[64];
+	char *name = "/dev/root";
+	char *fs_names, *p;
+	int err;
+	int do_devfs = 0;
+#ifdef CONFIG_ROOT_NFS
+	void *data;
+#endif
+	root_mountflags |= MS_VERBOSE;
+
+	fs_names = __getname();
+	get_fs_names(fs_names);
+
+#ifdef CONFIG_ROOT_NFS
+	if (MAJOR(ROOT_DEV) != UNNAMED_MAJOR)
+		goto skip_nfs;
+	data = nfs_root_data();
+	if (!data)
+		goto no_nfs;
+	err = mount("/dev/root", "/root", "nfs", root_mountflags, data);
+	if (!err)
+		goto done;
+no_nfs:
+	printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
+	ROOT_DEV = MKDEV(FLOPPY_MAJOR, 0);
+skip_nfs:
+#endif
+
+#ifdef CONFIG_BLK_DEV_FD
+	if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
+#ifdef CONFIG_BLK_DEV_RAM
+		extern int rd_doload;
+		extern void rd_load_secondary(void);
+#endif
+		floppy_eject();
+#ifndef CONFIG_BLK_DEV_RAM
+		printk(KERN_NOTICE "(Warning, this kernel has no ramdisk support)\n");
+#else
+		/* rd_doload is 2 for a dual initrd/ramload setup */
+		if(rd_doload==2)
+			rd_load_secondary();
+		else
+#endif
+		{
+			printk(KERN_NOTICE "VFS: Insert root floppy and press ENTER\n");
+			wait_for_keypress();
+		}
+	}
+#endif
+
+	devfs_make_root (root_device_name);
+	handle = devfs_find_handle (NULL, ROOT_DEVICE_NAME,
+	                            MAJOR (ROOT_DEV), MINOR (ROOT_DEV),
+				    DEVFS_SPECIAL_BLK, 1);
+	if (handle) {
+		int n;
+		unsigned major, minor;
+
+		devfs_get_maj_min (handle, &major, &minor);
+		ROOT_DEV = MKDEV (major, minor);
+		if (!ROOT_DEV)
+			panic("I have no root and I want to scream");
+		n = devfs_generate_path (handle, path + 5, sizeof (path) - 5);
+		if (n >= 0) {
+			name = path + n;
+			devfs_mk_symlink (NULL, "root", DEVFS_FL_DEFAULT,
+					  name + 5, NULL, NULL);
+			memcpy (name, "/dev/", 5);
+			do_devfs = 1;
+		}
+	}
+	chdir("/dev");
+	unlink("root");
+	mknod("root", S_IFBLK|0600, kdev_t_to_nr(ROOT_DEV));
+	if (do_devfs)
+		mount("devfs", ".", "devfs", 0, NULL);
+retry:
+	for (p = fs_names; *p; p += strlen(p)+1) {
+		err = mount(name,"/root",p,root_mountflags,root_mount_data);
+		switch (err) {
+			case 0:
+				goto done;
+			case -EACCES:
+				root_mountflags |= MS_RDONLY;
+				goto retry;
+			case -EINVAL:
+				continue;
+		}
+	        /*
+		 * Allow the user to distinguish between failed open
+		 * and bad superblock on root device.
+		 */
+		printk ("VFS: Cannot open root device \"%s\" or %s\n",
+			root_device_name, kdevname (ROOT_DEV));
+		printk ("Please append a correct \"root=\" boot option\n");
+		panic("VFS: Unable to mount root fs on %s",
+			kdevname(ROOT_DEV));
+	}
+	panic("VFS: Unable to mount root fs on %s", kdevname(ROOT_DEV));
+
+done:
+	putname(fs_names);
+	if (do_devfs)
+		umount(".", 0);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+
+static int __init change_root(kdev_t new_root_dev,const char *put_old)
+{
+	struct vfsmount *old_rootmnt;
+	struct nameidata devfs_nd;
+	char *new_devname = kmalloc(strlen("/dev/root.old")+1, GFP_KERNEL);
+	int error = 0;
+
+	if (new_devname)
+		strcpy(new_devname, "/dev/root.old");
+
+	/* .. here is directory mounted over root */
+	mount("..", ".", NULL, MS_MOVE, NULL);
+	chdir("/old");
+
+	read_lock(&current->fs->lock);
+	old_rootmnt = mntget(current->fs->pwdmnt);
+	read_unlock(&current->fs->lock);
+
+	/*  First unmount devfs if mounted  */
+	if (path_init("/old/dev", LOOKUP_FOLLOW|LOOKUP_POSITIVE, &devfs_nd))
+		error = path_walk("/old/dev", &devfs_nd);
+	if (!error) {
+		if (devfs_nd.mnt->mnt_sb->s_magic == DEVFS_SUPER_MAGIC &&
+		    devfs_nd.dentry == devfs_nd.mnt->mnt_root)
+			umount("/old/dev", 0);
+		path_release(&devfs_nd);
+	}
+
+	ROOT_DEV = new_root_dev;
+	mount_root();
+
+	chdir("/root");
+	ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
+	printk("VFS: Mounted root (%s filesystem)%s.\n",
+		current->fs->pwdmnt->mnt_sb->s_type->name,
+		(current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY) ? " readonly" : "");
+
+#if 1
+	shrink_dcache();
+	printk("change_root: old root has d_count=%d\n", 
+	       atomic_read(&old_rootmnt->mnt_root->d_count));
+#endif
+
+	error = mount("/old", "/root/initrd", NULL, MS_MOVE, NULL);
+	if (error) {
+		int blivet;
+		struct block_device *ramdisk = old_rootmnt->mnt_sb->s_bdev;
+
+		atomic_inc(&ramdisk->bd_count);
+		blivet = blkdev_get(ramdisk, FMODE_READ, 0, BDEV_FS);
+		printk(KERN_NOTICE "Trying to unmount old root ... ");
+		umount("/old", MNT_DETACH);
+		if (!blivet) {
+			blivet = ioctl_by_bdev(ramdisk, BLKFLSBUF, 0);
+			blkdev_put(ramdisk, BDEV_FS);
+		}
+		if (blivet) {
+			printk(KERN_ERR "error %d\n", blivet);
+		} else {
+			printk("okay\n");
+			error = 0;
+		}
+	} else {
+		spin_lock(&dcache_lock);
+		if (new_devname) {
+			void *p = old_rootmnt->mnt_devname;
+			old_rootmnt->mnt_devname = new_devname;
+			new_devname = p;
+		}
+		spin_unlock(&dcache_lock);
+	}
+
+	/* put the old stuff */
+	mntput(old_rootmnt);
+	kfree(new_devname);
+	return error;
+}
+
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static int do_linuxrc(void * shell)
+{
+	static char *argv[] = { "linuxrc", NULL, };
+	extern char * envp_init[];
+
+	chdir("/root");
+	mount(".", "/", NULL, MS_MOVE, NULL);
+	chroot(".");
+
+	mount_devfs_fs ();
+
+	close(0);close(1);close(2);
+	setsid();
+	(void) open("/dev/console",O_RDWR,0);
+	(void) dup(0);
+	(void) dup(0);
+	return execve(shell, argv, envp_init);
+}
+
+#endif
+
+/*
+ * Prepare the namespace - decide what/where to mount, load ramdisks, etc.
+ */
+void prepare_namespace(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+	int real_root_mountflags = root_mountflags;
+	if (!initrd_start)
+		mount_initrd = 0;
+	if (mount_initrd)
+		root_mountflags &= ~MS_RDONLY;
+	real_root_dev = ROOT_DEV;
+#endif
+	mkdir("/dev", 0700);
+	mkdir("/root", 0700);
+
+#ifdef CONFIG_BLK_DEV_RAM
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (mount_initrd)
+		initrd_load();
+	else
+#endif
+	rd_load();
+#endif
+
+	/* Mount the root filesystem.. */
+	mount_root();
+	chdir("/root");
+	ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
+	printk("VFS: Mounted root (%s filesystem)%s.\n",
+		current->fs->pwdmnt->mnt_sb->s_type->name,
+		(current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY) ? " readonly" : "");
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	root_mountflags = real_root_mountflags;
+	if (mount_initrd && ROOT_DEV != real_root_dev
+	    && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
+		int error;
+		int i, pid;
+		mkdir("/old", 0700);
+		chdir("/old");
+
+		pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
+		if (pid > 0) {
+			while (pid != wait(&i)) {
+				current->policy |= SCHED_YIELD;
+				schedule();
+			}
+		}
+		if (MAJOR(real_root_dev) != RAMDISK_MAJOR
+		     || MINOR(real_root_dev) != 0) {
+			error = change_root(real_root_dev,"/initrd");
+			if (error)
+				printk(KERN_ERR "Change root to /initrd: "
+				    "error %d\n",error);
+
+			chdir("/root");
+			mount(".", "/", NULL, MS_MOVE, NULL);
+			chroot(".");
+
+			mount_devfs_fs ();
+			return;
+		}
+		chroot("..");
+		chdir("/");
+		return;
+	}
+#endif
+	mount(".", "/", NULL, MS_MOVE, NULL);
+	chroot(".");
+
+	mount_devfs_fs ();
+}
diff --git a/init/main.c b/init/main.c
index b0e3304513e8..c7e9d0faa42a 100644
--- a/init/main.c
+++ b/init/main.c
@@ -120,17 +120,10 @@ extern void softirq_init(void);
 
 int rows, cols;
 
-#ifdef CONFIG_BLK_DEV_INITRD
-unsigned int real_root_dev;	/* do_proc_dointvec cannot handle kdev_t */
-#endif
-
-int root_mountflags = MS_RDONLY;
 char *execute_command;
-char root_device_name[64];
-
 
 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
-static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
+char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 
 static int __init profile_setup(char *str)
 {
@@ -141,175 +134,6 @@ static int __init profile_setup(char *str)
 
 __setup("profile=", profile_setup);
 
-
-static struct dev_name_struct {
-	const char *name;
-	const int num;
-} root_dev_names[] __initdata = {
-	{ "nfs",     0x00ff },
-	{ "hda",     0x0300 },
-	{ "hdb",     0x0340 },
-	{ "loop",    0x0700 },
-	{ "hdc",     0x1600 },
-	{ "hdd",     0x1640 },
-	{ "hde",     0x2100 },
-	{ "hdf",     0x2140 },
-	{ "hdg",     0x2200 },
-	{ "hdh",     0x2240 },
-	{ "hdi",     0x3800 },
-	{ "hdj",     0x3840 },
-	{ "hdk",     0x3900 },
-	{ "hdl",     0x3940 },
-	{ "hdm",     0x5800 },
-	{ "hdn",     0x5840 },
-	{ "hdo",     0x5900 },
-	{ "hdp",     0x5940 },
-	{ "hdq",     0x5A00 },
-	{ "hdr",     0x5A40 },
-	{ "hds",     0x5B00 },
-	{ "hdt",     0x5B40 },
-	{ "sda",     0x0800 },
-	{ "sdb",     0x0810 },
-	{ "sdc",     0x0820 },
-	{ "sdd",     0x0830 },
-	{ "sde",     0x0840 },
-	{ "sdf",     0x0850 },
-	{ "sdg",     0x0860 },
-	{ "sdh",     0x0870 },
-	{ "sdi",     0x0880 },
-	{ "sdj",     0x0890 },
-	{ "sdk",     0x08a0 },
-	{ "sdl",     0x08b0 },
-	{ "sdm",     0x08c0 },
-	{ "sdn",     0x08d0 },
-	{ "sdo",     0x08e0 },
-	{ "sdp",     0x08f0 },
-	{ "ada",     0x1c00 },
-	{ "adb",     0x1c10 },
-	{ "adc",     0x1c20 },
-	{ "add",     0x1c30 },
-	{ "ade",     0x1c40 },
-	{ "fd",      0x0200 },
-	{ "md",      0x0900 },	     
-	{ "xda",     0x0d00 },
-	{ "xdb",     0x0d40 },
-	{ "ram",     0x0100 },
-	{ "scd",     0x0b00 },
-	{ "mcd",     0x1700 },
-	{ "cdu535",  0x1800 },
-	{ "sonycd",  0x1800 },
-	{ "aztcd",   0x1d00 },
-	{ "cm206cd", 0x2000 },
-	{ "gscd",    0x1000 },
-	{ "sbpcd",   0x1900 },
-	{ "eda",     0x2400 },
-	{ "edb",     0x2440 },
-	{ "pda",	0x2d00 },
-	{ "pdb",	0x2d10 },
-	{ "pdc",	0x2d20 },
-	{ "pdd",	0x2d30 },
-	{ "pcd",	0x2e00 },
-	{ "pf",		0x2f00 },
-	{ "apblock", APBLOCK_MAJOR << 8},
-	{ "ddv", DDV_MAJOR << 8},
-	{ "jsfd",    JSFD_MAJOR << 8},
-#if defined(CONFIG_ARCH_S390)
-	{ "dasda", (DASD_MAJOR << MINORBITS) },
-	{ "dasdb", (DASD_MAJOR << MINORBITS) + (1 << 2) },
-	{ "dasdc", (DASD_MAJOR << MINORBITS) + (2 << 2) },
-	{ "dasdd", (DASD_MAJOR << MINORBITS) + (3 << 2) },
-	{ "dasde", (DASD_MAJOR << MINORBITS) + (4 << 2) },
-	{ "dasdf", (DASD_MAJOR << MINORBITS) + (5 << 2) },
-	{ "dasdg", (DASD_MAJOR << MINORBITS) + (6 << 2) },
-	{ "dasdh", (DASD_MAJOR << MINORBITS) + (7 << 2) },
-#endif
-#if defined(CONFIG_BLK_CPQ_DA) || defined(CONFIG_BLK_CPQ_DA_MODULE)
-	{ "ida/c0d0p",0x4800 },
-	{ "ida/c0d1p",0x4810 },
-	{ "ida/c0d2p",0x4820 },
-	{ "ida/c0d3p",0x4830 },
-	{ "ida/c0d4p",0x4840 },
-	{ "ida/c0d5p",0x4850 },
-	{ "ida/c0d6p",0x4860 },
-	{ "ida/c0d7p",0x4870 },
-	{ "ida/c0d8p",0x4880 },
-	{ "ida/c0d9p",0x4890 },
-	{ "ida/c0d10p",0x48A0 },
-	{ "ida/c0d11p",0x48B0 },
-	{ "ida/c0d12p",0x48C0 },
-	{ "ida/c0d13p",0x48D0 },
-	{ "ida/c0d14p",0x48E0 },
-	{ "ida/c0d15p",0x48F0 },
-#endif
-#if defined(CONFIG_BLK_CPQ_CISS_DA) || defined(CONFIG_BLK_CPQ_CISS_DA_MODULE)
-	{ "cciss/c0d0p",0x6800 },
-	{ "cciss/c0d1p",0x6810 },
-	{ "cciss/c0d2p",0x6820 },
-	{ "cciss/c0d3p",0x6830 },
-	{ "cciss/c0d4p",0x6840 },
-	{ "cciss/c0d5p",0x6850 },
-	{ "cciss/c0d6p",0x6860 },
-	{ "cciss/c0d7p",0x6870 },
-	{ "cciss/c0d8p",0x6880 },
-	{ "cciss/c0d9p",0x6890 },
-	{ "cciss/c0d10p",0x68A0 },
-	{ "cciss/c0d11p",0x68B0 },
-	{ "cciss/c0d12p",0x68C0 },
-	{ "cciss/c0d13p",0x68D0 },
-	{ "cciss/c0d14p",0x68E0 },
-	{ "cciss/c0d15p",0x68F0 },
-#endif
-	{ "nftla", 0x5d00 },
-	{ "nftlb", 0x5d10 },
-	{ "nftlc", 0x5d20 },
-	{ "nftld", 0x5d30 },
-	{ "ftla", 0x2c00 },
-	{ "ftlb", 0x2c08 },
-	{ "ftlc", 0x2c10 },
-	{ "ftld", 0x2c18 },
-	{ "mtdblock", 0x1f00 },
-	{ NULL, 0 }
-};
-
-kdev_t __init name_to_kdev_t(char *line)
-{
-	int base = 0;
-
-	if (strncmp(line,"/dev/",5) == 0) {
-		struct dev_name_struct *dev = root_dev_names;
-		line += 5;
-		do {
-			int len = strlen(dev->name);
-			if (strncmp(line,dev->name,len) == 0) {
-				line += len;
-				base = dev->num;
-				break;
-			}
-			dev++;
-		} while (dev->name);
-	}
-	return to_kdev_t(base + simple_strtoul(line,NULL,base?10:16));
-}
-
-static int __init root_dev_setup(char *line)
-{
-	int i;
-	char ch;
-
-	ROOT_DEV = name_to_kdev_t(line);
-	memset (root_device_name, 0, sizeof root_device_name);
-	if (strncmp (line, "/dev/", 5) == 0) line += 5;
-	for (i = 0; i < sizeof root_device_name - 1; ++i)
-	{
-	    ch = line[i];
-	    if ( isspace (ch) || (ch == ',') || (ch == '\0') ) break;
-	    root_device_name[i] = ch;
-	}
-	return 1;
-}
-
-__setup("root=", root_dev_setup);
-
 static int __init checksetup(char *line)
 {
 	struct kernel_param *p;
@@ -376,22 +200,6 @@ void __init calibrate_delay(void)
 		(loops_per_jiffy/(5000/HZ)) % 100);
 }
 
-static int __init readonly(char *str)
-{
-	if (*str)
-		return 0;
-	root_mountflags |= MS_RDONLY;
-	return 1;
-}
-
-static int __init readwrite(char *str)
-{
-	if (*str)
-		return 0;
-	root_mountflags &= ~MS_RDONLY;
-	return 1;
-}
-
 static int __init debug_kernel(char *str)
 {
 	if (*str)
@@ -408,8 +216,6 @@ static int __init quiet_kernel(char *str)
 	return 1;
 }
 
-__setup("ro", readonly);
-__setup("rw", readwrite);
 __setup("debug", debug_kernel);
 __setup("quiet", quiet_kernel);
 
@@ -624,21 +430,6 @@ asmlinkage void __init start_kernel(void)
 	rest_init();
 }
 
-#ifdef CONFIG_BLK_DEV_INITRD
-static int do_linuxrc(void * shell)
-{
-	static char *argv[] = { "linuxrc", NULL, };
-
-	close(0);close(1);close(2);
-	setsid();
-	(void) open("/dev/console",O_RDWR,0);
-	(void) dup(0);
-	(void) dup(0);
-	return execve(shell, argv, envp_init);
-}
-
-#endif
-
 struct task_struct *child_reaper = &init_task;
 
 static void __init do_initcalls(void)
@@ -745,61 +536,7 @@ static void __init do_basic_setup(void)
 #endif
 }
 
-extern void rd_load(void);
-extern void initrd_load(void);
-
-/*
- * Prepare the namespace - decide what/where to mount, load ramdisks, etc.
- */
-static void prepare_namespace(void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
-	int real_root_mountflags = root_mountflags;
-	if (!initrd_start)
-		mount_initrd = 0;
-	if (mount_initrd)
-		root_mountflags &= ~MS_RDONLY;
-	real_root_dev = ROOT_DEV;
-#endif
-
-#ifdef CONFIG_BLK_DEV_RAM
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (mount_initrd)
-		initrd_load();
-	else
-#endif
-	rd_load();
-#endif
-
-	/* Mount the root filesystem.. */
-	mount_root();
-
-	mount_devfs_fs ();
-
-#ifdef CONFIG_BLK_DEV_INITRD
-	root_mountflags = real_root_mountflags;
-	if (mount_initrd && ROOT_DEV != real_root_dev
-	    && MAJOR(ROOT_DEV) == RAMDISK_MAJOR && MINOR(ROOT_DEV) == 0) {
-		int error;
-		int i, pid;
-
-		pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
-		if (pid > 0) {
-			while (pid != wait(&i)) {
-				current->policy |= SCHED_YIELD;
-				schedule();
-			}
-		}
-		if (MAJOR(real_root_dev) != RAMDISK_MAJOR
-		     || MINOR(real_root_dev) != 0) {
-			error = change_root(real_root_dev,"/initrd");
-			if (error)
-				printk(KERN_ERR "Change root to /initrd: "
-				    "error %d\n",error);
-		}
-	}
-#endif
-}
+extern void prepare_namespace(void);
 
 static int init(void * unused)
 {