From: Jules Irenge <jbi.octave@gmail.com>
Date: Tue, 31 Mar 2020 20:46:41 +0000 (+0100)
Subject: btrfs: add missing annotation for btrfs_lock_cluster()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=c142c6a449c7765b0d3b6ecce0be8d783a19abcb;p=uclinux-h8%2Flinux.git

btrfs: add missing annotation for btrfs_lock_cluster()

Sparse reports a warning at btrfs_lock_cluster()

warning: context imbalance in btrfs_lock_cluster()
	- wrong count

The root cause is the missing annotation at btrfs_lock_cluster()
Add the missing __acquires(&cluster->refill_lock) annotation.

Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 54a64d1e18c6..752b229cbb13 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3369,6 +3369,7 @@ static struct btrfs_block_group *btrfs_lock_cluster(
 		   struct btrfs_block_group *block_group,
 		   struct btrfs_free_cluster *cluster,
 		   int delalloc)
+	__acquires(&cluster->refill_lock)
 {
 	struct btrfs_block_group *used_bg = NULL;