[PATCH 05/12] blk-mq: short cut the IPI path in blk_mq_force_complete_rq for !SMP

[Christoph Hellwig <hch@xxxxxx>]

Let the compile optimize out the entire IPI path, given that we are
obviously not going to use it.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 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 25ce40b367a635..059d30c522f2ad 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;
 	}
-- 
2.26.2