[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>
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index d14e139..ee80b8a 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -867,9 +867,9 @@
error = -EBUSY;
goto error;
}
- mutex_lock(&sb->s_bdev->bd_mount_mutex);
+ down(&sb->s_bdev->bd_mount_sem);
new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev);
- mutex_unlock(&sb->s_bdev->bd_mount_mutex);
+ up(&sb->s_bdev->bd_mount_sem);
if (IS_ERR(new)) {
error = PTR_ERR(new);
goto error;
