blk-mq: move the !async handling out of __blk_mq_delay_run_hw_queue

Only blk_mq_run_hw_queue can call __blk_mq_delay_run_hw_queue with
async=false, so move the handling there.

With this __blk_mq_delay_run_hw_queue can be merged into
blk_mq_delay_run_hw_queue.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20230413060651.694656-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

Author: Christoph Hellwig

block/blk-mq.c

@@ -2212,41 +2212,19 @@ static int blk_mq_hctx_next_cpu(struct blk_mq_hw_ctx *hctx)
 }
 
 /**
- * __blk_mq_delay_run_hw_queue - Run (or schedule to run) a hardware queue.
+ * blk_mq_delay_run_hw_queue - Run a hardware queue asynchronously.
  * @hctx: Pointer to the hardware queue to run.
- * @async: If we want to run the queue asynchronously.
  * @msecs: Milliseconds of delay to wait before running the queue.
  *
- * If !@async, try to run the queue now. Else, run the queue asynchronously and
- * with a delay of @msecs.
+ * Run a hardware queue asynchronously with a delay of @msecs.
  */
-static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
-					unsigned long msecs)
+void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)
 {
-	if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
-		if (cpumask_test_cpu(raw_smp_processor_id(), hctx->cpumask)) {
-			__blk_mq_run_hw_queue(hctx);
-			return;
-		}
-	}
-
 	if (unlikely(blk_mq_hctx_stopped(hctx)))
 		return;
 	kblockd_mod_delayed_work_on(blk_mq_hctx_next_cpu(hctx), &hctx->run_work,
 				    msecs_to_jiffies(msecs));
 }
-
-/**
- * blk_mq_delay_run_hw_queue - Run a hardware queue asynchronously.
- * @hctx: Pointer to the hardware queue to run.
- * @msecs: Milliseconds of delay to wait before running the queue.
- *
- * Run a hardware queue asynchronously with a delay of @msecs.
- */
-void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)
-{
-	__blk_mq_delay_run_hw_queue(hctx, true, msecs);
-}
 EXPORT_SYMBOL(blk_mq_delay_run_hw_queue);
 
 /**
@@ -2274,8 +2252,16 @@ void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)
 		need_run = !blk_queue_quiesced(hctx->queue) &&
 		blk_mq_hctx_has_pending(hctx));
 
-	if (need_run)
-		__blk_mq_delay_run_hw_queue(hctx, async, 0);
+	if (!need_run)
+		return;
+
+	if (async || (hctx->flags & BLK_MQ_F_BLOCKING) ||
+	    !cpumask_test_cpu(raw_smp_processor_id(), hctx->cpumask)) {
+		blk_mq_delay_run_hw_queue(hctx, 0);
+		return;
+	}
+
+	__blk_mq_run_hw_queue(hctx);
 }
 EXPORT_SYMBOL(blk_mq_run_hw_queue);