From ddca60c59032b2c2babc0003cf01015aff340b79 Mon Sep 17 00:00:00 2001
From: Arjan van de Ven <arjan@linux.intel.com>
Date: Fri, 14 Jul 2006 00:24:12 -0700
Subject: [PATCH] [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: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
block/ioctl.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/ioctl.c b/block/ioctl.c
index 9cfa2e1ecb24..309760b7e37f 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -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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