From d6cc464cc58424e137eca5e0a53226291044f5d2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 11 Jun 2020 08:44:45 +0200 Subject: [PATCH] blk-mq: short cut the IPI path in blk_mq_force_complete_rq for !SMP Let the compile optimize out the entire IPI path, given that we are obviously not going to use it. Reviewed-by: Daniel Wagner Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- block/blk-mq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/blk-mq.c b/block/blk-mq.c index ea083f5..eef2f3c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -727,7 +727,8 @@ void blk_mq_force_complete_rq(struct request *rq) return; } - if (!test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags)) { + if (!IS_ENABLED(CONFIG_SMP) || + !test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags)) { q->mq_ops->complete(rq); return; } -- 2.7.4