linux-kernel - [PATCH 01/30] btrfs: Add missing annotation for release_extent

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Date:   Sun, 23 Feb 2020 23:16:42 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     boqun.feng@...il.com
Cc:     jbi.octave@...il.com, linux-kernel@...r.kernel.org,
        Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>,
        David Sterba <dsterba@...e.com>,
        linux-btrfs@...r.kernel.org (open list:BTRFS FILE SYSTEM)
Subject: [PATCH 01/30] btrfs: Add missing annotation for release_extent_buffer()

Sparse reports a warning at release_extent_buffer()
warning: context imbalance in release_extent_buffer() - unexpected unlock

The root cause is the missing annotation at release_extent_buffer()
Add the missing __releases(&eb->refs_lock) annotation

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 fs/btrfs/extent_io.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index c0f202741e09..8b6d6893e7a7 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5230,6 +5230,7 @@ static inline void btrfs_release_extent_buffer_rcu(struct rcu_head *head)
 }
 
 static int release_extent_buffer(struct extent_buffer *eb)
+	__releases(&eb->refs_lock)
 {
 	lockdep_assert_held(&eb->refs_lock);
 
-- 
2.24.1