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Message-Id: <1447730650-23030-1-git-send-email-yalin.wang2010@gmail.com>
Date: Tue, 17 Nov 2015 11:24:10 +0800
From: yalin wang <yalin.wang2010@...il.com>
To: axboe@...nel.dk, linux-kernel@...r.kernel.org
Cc: yalin wang <yalin.wang2010@...il.com>
Subject: [RFC] block: change to use atomic_inc_return_release()
Some arch define this atomic_inc_return_release() OP.
Signed-off-by: yalin wang <yalin.wang2010@...il.com>
---
block/bio.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/block/bio.c b/block/bio.c
index fbc558b..b251857 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -310,8 +310,7 @@ static void bio_chain_endio(struct bio *bio, int error)
static inline void bio_inc_remaining(struct bio *bio)
{
bio->bi_flags |= (1 << BIO_CHAIN);
- smp_mb__before_atomic();
- atomic_inc(&bio->__bi_remaining);
+ atomic_inc_return_release(&bio->__bi_remaining);
}
/**
--
1.9.1
--
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