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Subject[PATCH] init: fix name of root device in /proc/mounts
Date
On a system that does not use an initramfs, /dev/root was always
listed in /proc/mounts. This breaks software which scans /proc/mounts to
determine which file systems are mounted since /dev/root is not a valid
device name.

This changes that processing so that "/dev/root" is only added to
/proc/mounts if a root device is not specified with the root= option on
the kernel command line.

Signed-off-by: William Hubbs <w.d.hubbs@gmail.com>
---
init/do_mounts.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 1d1b634..efc37d2 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -480,7 +480,10 @@ void __init change_floppy(char *fmt, ...)
va_start(args, fmt);
vsprintf(buf, fmt, args);
va_end(args);
- fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0);
+ if (saved_root_name[0])
+ fd = sys_open(saved_root_name, O_RDWR | O_NDELAY, 0);
+ else
+ fd = sys_open("/dev/root", O_RDWR | O_NDELAY, 0);
if (fd >= 0) {
sys_ioctl(fd, FDEJECT, 0);
sys_close(fd);
@@ -523,8 +526,13 @@ void __init mount_root(void)
}
#endif
#ifdef CONFIG_BLOCK
- create_dev("/dev/root", ROOT_DEV);
- mount_block_root("/dev/root", root_mountflags);
+ if (saved_root_name[0]) {
+ create_dev(saved_root_name, ROOT_DEV);
+ mount_block_root(saved_root_name, root_mountflags);
+ } else {
+ create_dev("/dev/root", ROOT_DEV);
+ mount_block_root("/dev/root", root_mountflags);
+ }
#endif
}

--
1.7.12.4


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