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[PATCH] Revert bd_mount_mutex back to a semaphore

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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 <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Chinner 2007-01-10 23:15:41 -08:00 • committed by Linus Torvalds
commit f73ca1b76c
5 changed files with 9 additions and 9 deletions
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4
fs/super.c
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@ -753,9 +753,9 @@ int get_sb_bdev(struct file_system_type *fs_type,
* will protect the lockfs code from trying to start a snapshot
* while we are mounting
*/
mutex_lock(&bdev->bd_mount_mutex);
down(&bdev->bd_mount_sem);
s = sget(fs_type, test_bdev_super, set_bdev_super, bdev);
mutex_unlock(&bdev->bd_mount_mutex);
up(&bdev->bd_mount_sem);
if (IS_ERR(s))
goto error_s;