[PATCH] block: use enumerate instead of integer in op_is_write()

[brookxu]

From: Chunguang Xu <brookxu@xxxxxxxxxxx>

For mask operation, using enumerate may be safer than integer.

Signed-off-by: Chunguang Xu <brookxu@xxxxxxxxxxx>
---
 include/linux/blk_types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index fd3860d1..b0411dc 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h
@@ -447,7 +447,7 @@ static inline void bio_set_op_attrs(struct bio *bio, unsigned op,
 
 static inline bool op_is_write(unsigned int op)
 {
-	return (op & 1);
+	return (op & REQ_OP_WRITE);
 }
 
 /*
-- 
1.8.3.1