[PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8()

Xishi Qiu
2015-09-11T02:05:59Z

Use IS_ALIGNED() to determine whether the shadow span two bytes.
It generates less code and more readable.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
---
mm/kasan/kasan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/kasan/kasan.c b/mm/kasan/kasan.c
index 7b28e9c..c6ddff1 100644
--- a/mm/kasan/kasan.c
+++ b/mm/kasan/kasan.c
@@ -120,7 +120,7 @@ static __always_inline bool memory_is_poisoned_8(unsigned long addr)
if (memory_is_poisoned_1(addr + 7))
return true;

- if (likely(((addr + 7) & KASAN_SHADOW_MASK) >= 7))
+ if (likely(IS_ALIGNED(addr, 8)))
return false;

return unlikely(*(u8 *)shadow_addr);
--
2.0.0