linux-kernel - [PATCH 30/30] sgi-xp: Add missing annotation for ocfs2_inode_cache_lock() and ocfs2_inode_cache

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Message-Id: <20200223231711.157699-31-jbi.octave@gmail.com>
Date:   Sun, 23 Feb 2020 23:17:11 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     boqun.feng@...il.com
Cc:     jbi.octave@...il.com, linux-kernel@...r.kernel.org,
        Mark Fasheh <mark@...heh.com>,
        Joel Becker <jlbec@...lplan.org>,
        Joseph Qi <joseph.qi@...ux.alibaba.com>,
        ocfs2-devel@....oracle.com (moderated list:ORACLE CLUSTER FILESYSTEM 2
        (OCFS2))
Subject: [PATCH 30/30] sgi-xp: Add missing annotation for ocfs2_inode_cache_lock() and ocfs2_inode_cache_unlock()

Sparse reports a warning at ocfs2_inode_cache_lock()
and ocfs2_inode_cache_unlock()
warning: context imbalance in ocfs2_inode_cache_lock()
	- wrong count at exit

warning: context imbalance in ocfs2_inode_cache_unlock()
	- unexpected unlock
The root cause is a missing annotation at ocfs2_inode_cache_lock()
and at ocfs2_inode_cache_unlock()

Add the missing __acquires(&oi->ip_lock) annotation
Add the missing __releases(&oi->ip_lock) annotation

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
 fs/ocfs2/inode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 7c9dfd50c1c1..0b87e0a63ab9 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1623,6 +1623,7 @@ static struct super_block *ocfs2_inode_cache_get_super(struct ocfs2_caching_info
 }
 
 static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
+	__acquires(&oi->ip_lock)
 {
 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
 
@@ -1630,6 +1631,7 @@ static void ocfs2_inode_cache_lock(struct ocfs2_caching_info *ci)
 }
 
 static void ocfs2_inode_cache_unlock(struct ocfs2_caching_info *ci)
+	__releases(&oi->ip_lock)
 {
 	struct ocfs2_inode_info *oi = cache_info_to_inode(ci);
 
-- 
2.24.1