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[PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8()

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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


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[PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8() Xishi Qiu <qiuxishi@huawei.com> - 2015-09-11 04:10 +0200
  Re: [PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8() Andrew Morton <akpm@linux-foundation.org> - 2015-09-12 00:50 +0200
    Re: [PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8() Xishi Qiu <qiuxishi@huawei.com> - 2015-09-14 03:20 +0200
    Re: [PATCH] kasan: use IS_ALIGNED in memory_is_poisoned_8() Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2015-09-14 15:20 +0200

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