linux-kernel - [PATCH 03/30] mm/memcontrol: Add missing annotation for unlock_page

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Message-Id: <20200214204741.94112-4-jbi.octave@gmail.com>
Date:   Fri, 14 Feb 2020 20:47:14 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     boqun.feng@...il.com, Jules Irenge <jbi.octave@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        cgroups@...r.kernel.org (open list:CONTROL GROUP - MEMORY RESOURCE
        CONTROLLER (MEMCG)),
        linux-mm@...ck.org (open list:CONTROL GROUP - MEMORY RESOURCE
        CONTROLLER (MEMCG))
Subject: [PATCH 03/30] mm/memcontrol: Add missing annotation for unlock_page_lru()

Sparse reports warning at unlock_page_lry()

warning: context imbalance in unlock_page_lru() - unexpected unlock

The root cause is the missing annotation at unlock_page_lru()
Add the missing __releases(&pgdat->lru_lock)

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

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6f6dc8712e39..22ddd557a69b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2587,6 +2587,7 @@ static void lock_page_lru(struct page *page, int *isolated)
 }
 
 static void unlock_page_lru(struct page *page, int isolated)
+	__releases(&pgdat->lru_lock)
 {
 	pg_data_t *pgdat = page_pgdat(page);
 
-- 
2.24.1