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mtd: uninitialized variable warning in map.h 

The map_word_load() function initializes exactly
as many words in the buffer as required, but gcc
cannot figure this out and gives a misleading
warning. Marking the local variable as
uninitialized_var shuts up that warning.

Without this patch, building acs5k_defconfig results in:

drivers/mtd/chips/cfi_cmdset_0002.c: In function 'cfi_amdstd_panic_write':
include/linux/mtd/map.h:331:11: warning: 'r.x[0]' may be used uninitialized in this function [-Wuninitialized]
drivers/mtd/chips/cfi_cmdset_0002.c: In function 'cfi_amdstd_write_words':
include/linux/mtd/map.h:331:11: warning: 'r.x[0]' may be used uninitialized in this function [-Wuninitialized]
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 [-Wuninitialized]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Arnd Bergmann 2012-11-06 22:55:28 +01:00 committed by Artem Bityutskiy
parent d611d41b46
commit 5d27aa5af0
1 changed files with 1 additions and 1 deletions
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2
include/linux/mtd/map.h
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@ -391,7 +391,7 @@ static inline map_word map_word_ff(struct map_info *map)
static inline map_word inline_map_read(struct map_info *map, unsigned long ofs) static inline map_word inline_map_read(struct map_info *map, unsigned long ofs)
{ {
map_word r; map_word uninitialized_var(r);
if (map_bankwidth_is_1(map)) if (map_bankwidth_is_1(map))
r.x[0] = __raw_readb(map->virt + ofs); r.x[0] = __raw_readb(map->virt + ofs);