linux-kernel - [PATCH 3.2 120/147] mtd: map: Fix compilation warning

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Date:   Mon, 06 Nov 2017 23:03:07 +0000
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Artem Bityutskiy" <artem.bityutskiy@...ux.intel.com>,
        "Viresh Kumar" <viresh.kumar@...aro.org>
Subject: [PATCH 3.2 120/147] mtd: map: Fix compilation warning

3.2.95-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Viresh Kumar <viresh.kumar@...aro.org>

commit 3e9ce49e0ef95e22790a74720f0068696b2477c9 upstream.

This patch is an attempt to fix following compilation warning.

In file included from drivers/mtd/chips/cfi_cmdset_0001.c:35:0:
drivers/mtd/chips/cfi_cmdset_0001.c: In function 'cfi_intelext_write_words':
include/linux/mtd/map.h:331:11: warning: 'r.x[0]' may be used uninitialized in this function [-Wmaybe-uninitialized]

I could have used uninitialized_var() too, but didn't used it as the final else
part of map_word_load() is missing. So there is a chance that it might be passed
uninitialized. Better initialize to zero.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 include/linux/mtd/map.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/mtd/map.h
+++ b/include/linux/mtd/map.h
@@ -327,7 +327,7 @@ static inline int map_word_bitsset(struc
 
 static inline map_word map_word_load(struct map_info *map, const void *ptr)
 {
-	map_word r;
+	map_word r = {{0} };
 
 	if (map_bankwidth_is_1(map))
 		r.x[0] = *(unsigned char *)ptr;