[PATCH 4.9 16/62] kasan: remove redundant initialization of variable real_size

From: Greg Kroah-Hartman
Date: Mon May 06 2019 - 10:48:04 EST

From: Colin Ian King <colin.king@xxxxxxxxxxxxx>

commit 48c232395431c23d35cf3b4c5a090bd793316578 upstream.

Variable real_size is initialized with a value that is never read, it is
re-assigned a new value later on, hence the initialization is redundant
and can be removed.

Cleans up clang warning:

lib/test_kasan.c:422:21: warning: Value stored to 'real_size' during its initialization is never read

Link: http://lkml.kernel.org/r/20180206144950.32457-1-colin.king@xxxxxxxxxxxxx
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Acked-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

lib/test_kasan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -355,7 +355,7 @@ static noinline void __init kasan_stack_
static noinline void __init ksize_unpoisons_memory(void)
char *ptr;
- size_t size = 123, real_size = size;
+ size_t size = 123, real_size;

pr_info("ksize() unpoisons the whole allocated chunk\n");
ptr = kmalloc(size, GFP_KERNEL);