linux-kernel - [PATCH 4.14 12/75] kasan: remove redundant initialization of variable real

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Date:   Mon,  6 May 2019 16:32:20 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Alexander Potapenko <glider@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrey Konovalov <andreyknvl@...gle.com>
Subject: [PATCH 4.14 12/75] kasan: remove redundant initialization of variable real_size

From: Colin Ian King <colin.king@...onical.com>

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@canonical.com
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Acked-by: Andrey Ryabinin <aryabinin@...tuozzo.com>
Reviewed-by: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Potapenko <glider@...gle.com>
Cc: Dmitry Vyukov <dvyukov@...gle.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Andrey Konovalov <andreyknvl@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

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

--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -389,7 +389,7 @@ 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);