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authorFilippo Muzzini <filippo.muzzini@outlook.it>2018-05-31 15:23:13 +0200
committerJens Axboe <axboe@kernel.dk>2018-05-31 08:48:32 -0600
commitac857e0d54c84edc1fdc578153f4f728c69c0e29 (patch)
treef175026634ac7f611c3a1212b3dffe892ffe244b /block/bfq-iosched.c
parent8abfa4d6fd1537a570d99c52e9a683b759c27a45 (diff)
downloadlinux-0-day-ac857e0d54c84edc1fdc578153f4f728c69c0e29.tar.gz
block, bfq: remove the removal of 'next' rq in bfq_requests_merged
Since bfq_finish_request() is always called on the request 'next', after bfq_requests_merged() is finished, and bfq_finish_request() removes 'next' from its bfq_queue if needed, it isn't necessary to do such a removal in advance in bfq_merged_requests(). This commit removes such a useless 'next' removal. Signed-off-by: Filippo Muzzini <filippo.muzzini@outlook.it> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
-rw-r--r--block/bfq-iosched.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index aa32e56..dd527bab 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1845,8 +1845,6 @@ static void bfq_request_merged(struct request_queue *q, struct request *req,
* exploits this hook to address the following issue: if 'next' has a
* fifo_time lower that rq, then the fifo_time of rq must be set to
* the value of 'next', to not forget the greater age of 'next'.
- * Moreover 'next' may be in a bfq_queue, in this case it must be
- * removed.
*
* NOTE: in this function we assume that rq is in a bfq_queue, basing
* on that rq is picked from the hash table q->elevator->hash, which,
@@ -1881,11 +1879,6 @@ static void bfq_requests_merged(struct request_queue *q, struct request *rq,
if (bfqq->next_rq == next)
bfqq->next_rq = rq;
- if (!RB_EMPTY_NODE(&next->rb_node)) {
- bfq_remove_request(q, next);
- bfqg_stats_update_io_remove(bfqq_group(bfqq), next->cmd_flags);
- }
-
bfqg_stats_update_io_merged(bfqq_group(bfqq), next->cmd_flags);
}