linux-kernel - [PATCH v4 2/9] mm/huge_memory: fix uninitialized compiler warning

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Message-Id: <1574166203-151975-3-git-send-email-alex.shi@linux.alibaba.com>
Date:   Tue, 19 Nov 2019 20:23:16 +0800
From:   Alex Shi <alex.shi@...ux.alibaba.com>
To:     cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        mgorman@...hsingularity.net, tj@...nel.org, hughd@...gle.com,
        khlebnikov@...dex-team.ru, daniel.m.jordan@...cle.com,
        yang.shi@...ux.alibaba.com, willy@...radead.org,
        shakeelb@...gle.com, hannes@...xchg.org
Cc:     Alex Shi <alex.shi@...ux.alibaba.com>
Subject: [PATCH v4 2/9] mm/huge_memory: fix uninitialized compiler warning

../mm/huge_memory.c: In function ‘split_huge_page_to_list’:
../mm/huge_memory.c:2766:9: warning: ‘flags’ may be used uninitialized
in this function [-Wmaybe-uninitialized]
  lruvec = lock_page_lruvec_irqsave(head, pgdata, flags);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Alex Shi <alex.shi@...ux.alibaba.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
---
 mm/huge_memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 13cc93785006..4cdfdbeb6b2b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2699,7 +2699,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list)
 	struct address_space *mapping = NULL;
 	int count, mapcount, extra_pins, ret;
 	bool mlocked;
-	unsigned long flags;
+	unsigned long flags = 0;
 	pgoff_t end;
 
 	VM_BUG_ON_PAGE(is_huge_zero_page(page), page);
-- 
1.8.3.1