#include <linux/device.h>
#include <linux/init.h>
#include <linux/fs.h>
+#include <linux/initrd.h>
+#include <linux/async.h>
+#include <linux/fs_struct.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_fs_sb.h>
int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
int root_mountflags = MS_RDONLY | MS_SILENT;
-char * __initdata root_device_name;
+static char * __initdata root_device_name;
static char __initdata saved_root_name[64];
static int __initdata root_wait;
char s[32];
char *p;
dev_t res = 0;
+ int part;
if (strncmp(name, "/dev/", 5) != 0) {
unsigned maj, min;
for (p = s; *p; p++)
if (*p == '/')
*p = '!';
- res = blk_lookup_devt(s);
+ res = blk_lookup_devt(s, 0);
+ if (res)
+ goto done;
+
+ /*
+ * try non-existant, but valid partition, which may only exist
+ * after revalidating the disk, like partitioned md devices
+ */
+ while (p > s && isdigit(p[-1]))
+ p--;
+ if (p == s || !*p || *p == '0')
+ goto fail;
+
+ /* try disk name without <part number> */
+ part = simple_strtoul(p, NULL, 10);
+ *p = '\0';
+ res = blk_lookup_devt(s, part);
+ if (res)
+ goto done;
+
+ /* try disk name without p<part number> */
+ if (p < s + 2 || !isdigit(p[-2]) || p[-1] != 'p')
+ goto fail;
+ p[-1] = '\0';
+ res = blk_lookup_devt(s, part);
if (res)
goto done;
return err;
sys_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" : "");
+ ROOT_DEV = current->fs->pwd.mnt->mnt_sb->s_dev;
+ printk("VFS: Mounted root (%s filesystem)%s on device %u:%u.\n",
+ current->fs->pwd.mnt->mnt_sb->s_type->name,
+ current->fs->pwd.mnt->mnt_sb->s_flags & MS_RDONLY ?
+ " readonly" : "", MAJOR(ROOT_DEV), MINOR(ROOT_DEV));
return 0;
}
void __init mount_block_root(char *name, int flags)
{
- char *fs_names = __getname();
+ char *fs_names = __getname_gfp(GFP_KERNEL
+ | __GFP_NOTRACK_FALSE_POSITIVE);
char *p;
#ifdef CONFIG_BLOCK
char b[BDEVNAME_SIZE];
printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
printk_all_partitions();
+#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
+ printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
+ "explicit textual name for \"root=\" boot option.\n");
+#endif
panic("VFS: Unable to mount root fs on %s", b);
}
ssleep(root_delay);
}
- /* wait for the known devices to complete their probing */
- while (driver_probe_done() != 0)
- msleep(100);
+ /*
+ * wait for the known devices to complete their probing
+ *
+ * Note: this is a potential source of long boot delays.
+ * For example, it is not atypical to wait 5 seconds here
+ * for the touchpad of a laptop to initialize.
+ */
+ wait_for_device_probe();
md_run_setup();
if (saved_root_name[0]) {
root_device_name = saved_root_name;
- if (!strncmp(root_device_name, "mtd", 3)) {
+ if (!strncmp(root_device_name, "mtd", 3) ||
+ !strncmp(root_device_name, "ubi", 3)) {
mount_block_root(root_device_name, root_mountflags);
goto out;
}
while (driver_probe_done() != 0 ||
(ROOT_DEV = name_to_dev_t(saved_root_name)) == 0)
msleep(100);
+ async_synchronize_full();
}
is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
mount_root();
out:
+ devtmpfs_mount("dev");
sys_mount(".", "/", NULL, MS_MOVE, NULL);
sys_chroot(".");
}
-