From 6796bf54a64df36f96a42ae222423fffe36c58a5 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 8 Dec 2006 02:36:16 -0800 Subject: [PATCH] [PATCH] lockdep: use mutex_lock_nested for bd_mutex to avoid lockdep warning Now that the nesting in blkdev_{get,put} is simpler, adding mutex_lock_nested is trivial. Cc: Ingo Molnar Acked-by: Peter Zijlstra Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/block_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 19f5f153ddb8..846f32d51be7 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -920,7 +920,7 @@ static int do_open(struct block_device *bdev, struct file *file, int for_part) } owner = disk->fops->owner; - mutex_lock(&bdev->bd_mutex); + mutex_lock_nested(&bdev->bd_mutex, for_part); if (!bdev->bd_openers) { bdev->bd_disk = disk; bdev->bd_contains = bdev; @@ -1062,7 +1062,7 @@ static int __blkdev_put(struct block_device *bdev, int for_part) struct gendisk *disk = bdev->bd_disk; struct block_device *victim = NULL; - mutex_lock(&bdev->bd_mutex); + mutex_lock_nested(&bdev->bd_mutex, for_part); lock_kernel(); if (for_part) bdev->bd_part_count--; -- 2.20.1