[PATCH] Revert bd_mount_mutex back to a semaphore

Revert bd_mount_mutex back to a semaphore so that xfs_freeze -f /mnt/newtest;
xfs_freeze -u /mnt/newtest works safely and doesn't produce lockdep warnings.

(XFS unlocks the semaphore from a different task, by design.  The mutex
code warns about this)

Signed-off-by: Dave Chinner <dgc@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 1715d6b5f411..8b18e43b82fe 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -411,7 +411,7 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag
         {
                 memset(bdev, 0, sizeof(*bdev));
                 mutex_init(&bdev->bd_mutex);
-                mutex_init(&bdev->bd_mount_mutex);
+                sema_init(&bdev->bd_mount_sem, 1);
                 INIT_LIST_HEAD(&bdev->bd_inodes);
                 INIT_LIST_HEAD(&bdev->bd_list);
 #ifdef CONFIG_SYSFS