Revert "vfs: Export file system uuid via /proc/<pid>/mountinfo"

This reverts commit 93f1c20bc8cdb757be50566eff88d65c3b26881f.

It turns out that libmount misparses it because it adds a '-' character
in the uuid string, which libmount then incorrectly confuses with the
separator string (" - ") at the end of all the optional arguments.

Upstream libmount (in the util-linux tree) has been fixed, but until
that fix actually percolates up to users, we'd better not expose this
change in the kernel.

Let's revisit this later (possibly by exposing the UUID without any '-'
characters in it, avoiding the user-space bug).

Reported-by: Dave Jones <davej@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Karel Zak <kzak@redhat.com>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index dbd860af080..5b14843af9f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1403,7 +1403,6 @@ struct super_block {
         wait_queue_head_t       s_wait_unfrozen;
 
         char s_id[32];                          /* Informational name */
-        u8 s_uuid[16];                          /* UUID */
 
         void                    *s_fs_info;     /* Filesystem private info */
         fmode_t                 s_mode;