[PATCH 5.15.y 1/2] blk-iocost: Simplify ioc_rqos_done()

[Sasha Levin <sashal@kernel.org>]

From: Bart Van Assche <bvanassche@acm.org>

[ Upstream commit 62c159a03da92121b1b909fd8039028de97885fc ]

Leave out the superfluous "& REQ_OP_MASK" code. The definition of req_op()
shows that that code is superfluous:

 #define req_op(req) ((req)->cmd_flags & REQ_OP_MASK)

Compile-tested only.

Cc: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20220615225549.1054905-2-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: e9804489e27d ("blk-iocost: account flush sequence latency only once")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 block/blk-iocost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 496aa2d4c435a..2c3047d2c80e1 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2808,7 +2808,7 @@ static void ioc_rqos_done(struct rq_qos *rqos, struct request *rq)
 	if (!ioc->enabled || !rq->alloc_time_ns || !rq->start_time_ns)
 		return;
 
-	switch (req_op(rq) & REQ_OP_MASK) {
+	switch (req_op(rq)) {
 	case REQ_OP_READ:
 		pidx = QOS_RLAT;
 		rw = READ;
-- 
2.53.0