block, bfq: improve code of bfq_bfqq_charge_time

bfq_bfqq_charge_time contains some lengthy and redundant code. This
commit trims and condenses that code.

Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c
index d558fd26740c946c82afdff9df892b9c222d01ef..ae52bff43ce4ff1697fdfdbc0c9c10fb4148c69e 100644 (file)
--- a/block/bfq-wf2q.c
+++ b/block/bfq-wf2q.c
@@ -881,15 +881,11 @@ void bfq_bfqq_charge_time(struct bfq_data *bfqd, struct bfq_queue *bfqq,
                          unsigned long time_ms)
 {
        struct bfq_entity *entity = &bfqq->entity;
-       int tot_serv_to_charge = entity->service;
-       unsigned int timeout_ms = jiffies_to_msecs(bfq_timeout);
-
-       if (time_ms > 0 && time_ms < timeout_ms)
-               tot_serv_to_charge =
-                       (bfqd->bfq_max_budget * time_ms) / timeout_ms;
-
-       if (tot_serv_to_charge < entity->service)
-               tot_serv_to_charge = entity->service;
+       unsigned long timeout_ms = jiffies_to_msecs(bfq_timeout);
+       unsigned long bounded_time_ms = min(time_ms, timeout_ms);
+       int serv_to_charge_for_time =
+               (bfqd->bfq_max_budget * bounded_time_ms) / timeout_ms;
+       int tot_serv_to_charge = max(serv_to_charge_for_time, entity->service);
 
        /* Increase budget to avoid inconsistencies */
        if (tot_serv_to_charge > entity->budget)