From: Qian Cai <cai@xxxxxx>
Subject: kasan: fix variable 'tag' set but not used warning
set_tag() compiles away when CONFIG_KASAN_SW_TAGS=n, so make
arch_kasan_set_tag() a static inline function to fix warnings below.
mm/kasan/common.c: In function '__kasan_kmalloc':
mm/kasan/common.c:475:5: warning: variable 'tag' set but not used
[-Wunused-but-set-variable]
u8 tag;
^~~
Link: http://lkml.kernel.org/r/20190307185244.54648-1-cai@xxxxxx
Signed-off-by: Qian Cai <cai@xxxxxx>
Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan.h | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/mm/kasan/kasan.h~kasan-fix-variable-tag-set-but-not-used-warning
+++ a/mm/kasan/kasan.h
@@ -163,7 +163,10 @@ static inline u8 random_tag(void)
#endif
#ifndef arch_kasan_set_tag
-#define arch_kasan_set_tag(addr, tag) ((void *)(addr))
+static inline const void *arch_kasan_set_tag(const void *addr, u8 tag)
+{
+ return addr;
+}
#endif
#ifndef arch_kasan_reset_tag
#define arch_kasan_reset_tag(addr) ((void *)(addr))
_
