GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-27 17:11:46 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[PATCH] Revert bd_mount_mutex back to a semaphore

Browse source 
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>
This commit is contained in:
David Chinner 2007-01-10 23:15:41 -08:00 • committed by Linus Torvalds
parent 88bf7b391d
commit f73ca1b76c
5 changed files with 9 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

6
fs/buffer.c
View file

@ -180,7 +180,7 @@ int fsync_bdev(struct block_device *bdev)
* freeze_bdev -- lock a filesystem and force it into a consistent state
* @bdev: blockdevice to lock
*
* This takes the block device bd_mount_mutex to make sure no new mounts
* This takes the block device bd_mount_sem to make sure no new mounts
* happen on bdev until thaw_bdev() is called.
* If a superblock is found on this device, we take the s_umount semaphore
* on it to make sure nobody unmounts until the snapshot creation is done.
@ -189,7 +189,7 @@ struct super_block *freeze_bdev(struct block_device *bdev)
{
struct super_block *sb;
mutex_lock(&bdev->bd_mount_mutex);
down(&bdev->bd_mount_sem);
sb = get_super(bdev);
if (sb && !(sb->s_flags & MS_RDONLY)) {
sb->s_frozen = SB_FREEZE_WRITE;
@ -231,7 +231,7 @@ void thaw_bdev(struct block_device *bdev, struct super_block *sb)
drop_super(sb);
}
mutex_unlock(&bdev->bd_mount_mutex);
up(&bdev->bd_mount_sem);
}
EXPORT_SYMBOL(thaw_bdev);