Commit 94f4857f authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

rbd: remove barriers from img_request_layered_{set,clear,test}() 



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: default avatarIlya Dryomov <idryomov@gmail.com>
parent 072eaf3c

drivers/block/rbd.c

+0 −3
Original line number Diff line number Diff line
@@ -1366,18 +1366,15 @@ 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;

}