linux-kernel - [PATCH] fs/direct-io.c: Fix compilation warning for uninitialized variables

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Date:	Fri,  4 Jul 2014 11:13:52 +0530
From:	pramod.gurav.etc@...il.com
To:	unlisted-recipients:; (no To-header on input)
Cc:	Pramod Gurav <pramod.gurav.etc@...il.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] fs/direct-io.c: Fix compilation warning for uninitialized variables

From: Pramod Gurav <pramod.gurav.etc@...il.com>

Fixes below warning while compiling the kernel.

fs/direct-io.c: In function ‘__blockdev_direct_IO’:
fs/direct-io.c:1011:12: warning: ‘to’ may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/direct-io.c:913:16: note: ‘to’ was declared here
fs/direct-io.c:1011:12: warning: ‘from’ may be used uninitialized in this function [-Wmaybe-uninitialized]
fs/direct-io.c:913:10: note: ‘from’ was declared here

Signed-off-by: Pramod Gurav <pramod.gurav.etc@...il.com>

CC: Alexander Viro <viro@...iv.linux.org.uk>
CC: linux-fsdevel@...r.kernel.org
CC: linux-kernel@...r.kernel.org
---
 fs/direct-io.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 98040ba..6ad5d2c 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -910,7 +910,7 @@ static int do_direct_IO(struct dio *dio, struct dio_submit *sdio,
 
 	while (sdio->block_in_file < sdio->final_block_in_request) {
 		struct page *page;
-		size_t from, to;
+		size_t from = 0, to = 0;
 		page = dio_get_page(dio, sdio, &from, &to);
 		if (IS_ERR(page)) {
 			ret = PTR_ERR(page);
-- 
1.7.9.5

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