linux-kernel - [PATCH 19/30] mm/zsmalloc: Add missing annotation for migrate_write

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Message-Id: <20200223231711.157699-20-jbi.octave@gmail.com>
Date:   Sun, 23 Feb 2020 23:17:00 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     boqun.feng@...il.com
Cc:     jbi.octave@...il.com, linux-kernel@...r.kernel.org,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm@...ck.org (open list:ZSMALLOC COMPRESSED SLAB MEMORY ALLOCATOR)
Subject: [PATCH 19/30] mm/zsmalloc: Add missing annotation for migrate_write_lock()

Sparse reports a warning at migrate_write_lock()
warning: context imbalance in migrate_write_lock() - wrong count at exit
The root cause is the missing annotation at migrate_write_lock()
Add the missing __acquires(&zspage->lock)

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

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 10a96651cb97..7ec69a1140cf 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1846,6 +1846,7 @@ static void migrate_read_unlock(struct zspage *zspage) __releases(&zspage->lock)
 }
 
 static void migrate_write_lock(struct zspage *zspage)
+	__acquires(&zspage->lock)
 {
 	write_lock(&zspage->lock);
 }
-- 
2.24.1