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From: Ilya Dryomov <idryomov@gmail.com>
To: ceph-devel@vger.kernel.org
Subject: [PATCH] rbd: remove barriers from img_request_layered_{set,clear,test}()
Date: Thu, 30 Jan 2020 14:31:02 +0100	[thread overview]
Message-ID: <20200130133102.13745-1-idryomov@gmail.com> (raw)

IMG_REQ_LAYERED is set in rbd_img_request_create(), and tested and
cleared in rbd_img_request_destroy() when the image request is about to
be destroyed.  The barriers are unnecessary.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 drivers/block/rbd.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index f21f9bc8d74a..4e494d5600cc 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1371,18 +1371,15 @@ static void rbd_osd_submit(struct ceph_osd_request *osd_req)
 static void img_request_layered_set(struct rbd_img_request *img_request)
 {
 	set_bit(IMG_REQ_LAYERED, &img_request->flags);
-	smp_mb();
 }
 
 static void img_request_layered_clear(struct rbd_img_request *img_request)
 {
 	clear_bit(IMG_REQ_LAYERED, &img_request->flags);
-	smp_mb();
 }
 
 static bool img_request_layered_test(struct rbd_img_request *img_request)
 {
-	smp_mb();
 	return test_bit(IMG_REQ_LAYERED, &img_request->flags) != 0;
 }
 
-- 
2.19.2

                 reply	other threads:[~2020-01-30 13:30 UTC|newest]

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