Commit ddca60c5 authored by Arjan van de Ven's avatar Arjan van de Ven Committed by Linus Torvalds
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[PATCH] lockdep: annotate the BLKPG_DEL_PARTITION ioctl 



The delete partition IOCTL takes the bd_mutex for both the disk and the
partition; these have an obvious hierarchical relationship and this patch
annotates this relationship for lockdep.

Signed-off-by: default avatarArjan van de Ven <arjan@linux.intel.com>
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 7e56a7dc

block/ioctl.c

+2 −2
Original line number Diff line number Diff line
@@ -72,7 +72,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user 
			bdevp = bdget_disk(disk, part);

			if (!bdevp)

				return -ENOMEM;

			mutex_lock(&bdevp->bd_mutex);

			mutex_lock_nested(&bdevp->bd_mutex, BD_MUTEX_PARTITION);

			if (bdevp->bd_openers) {

				mutex_unlock(&bdevp->bd_mutex);

				bdput(bdevp);
@@ -82,7 +82,7 @@ static int blkpg_ioctl(struct block_device *bdev, struct blkpg_ioctl_arg __user 
			fsync_bdev(bdevp);

			invalidate_bdev(bdevp, 0);



			mutex_lock(&bdev->bd_mutex);

			mutex_lock_nested(&bdev->bd_mutex, BD_MUTEX_WHOLE);

			delete_partition(disk, part);

			mutex_unlock(&bdev->bd_mutex);

			mutex_unlock(&bdevp->bd_mutex);

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