[PATCH] writeback: fix build warning about may be used uninitialized params

[PATCH] writeback: fix build warning about may be used uninitialized params

[Xiubo Li]

From: lixiubo <lixiubo@cmss.chinamobile.com>

warning: a??m_thresha?? may be used uninitialized in this function
[-Wmaybe-uninitialized]
 warning: a??m_dirtya?? may be used uninitialized in this function
[-Wmaybe-uninitialized]

This may introduce some rask.

Signed-off-by: lixiubo <lixiubo@cmss.chinamobile.com>
---
 mm/page-writeback.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 2c90357..01ad30f 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1542,7 +1542,7 @@ static void balance_dirty_pages(struct address_space *mapping,
 	for (;;) {
 		unsigned long now = jiffies;
 		unsigned long dirty, thresh, bg_thresh;
-		unsigned long m_dirty, m_thresh, m_bg_thresh;
+		unsigned long m_dirty = 0, m_thresh = 0, m_bg_thresh;
 
 		/*
 		 * Unstable writes are a feature of certain networked
-- 
1.8.3.1


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