cfq-iosched: algebraic simplification in cfq_prio_to_maxrq()

Simplify the calculation in cfq_prio_to_maxrq(), plus replace CFQ_PRIO_LISTS to
IOPRIO_BE_NR since they are the same and IOPRIO_BE_NR looks more reasonable in
this context IMHO.

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 0316f6eece03..00763e510228 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2102,7 +2102,7 @@ cfq_prio_to_maxrq(struct cfq_data *cfqd, struct cfq_queue *cfqq)
 
         WARN_ON(cfqq->ioprio >= IOPRIO_BE_NR);
 
-        return 2 * (base_rq + base_rq * (CFQ_PRIO_LISTS - 1 - cfqq->ioprio));
+        return 2 * base_rq * (IOPRIO_BE_NR - cfqq->ioprio);
 }
 
 /*