[PATCH 2/5] blk-mq: add helper of blk_mq_get_hw_queue_node

[Ming Lei <ming.lei@redhat.com>]

Add helper of blk_mq_get_hw_queue_node for retrieve hw queue's numa
node.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Christoph Hellwig <hch@lst.de>
---
 block/blk-mq.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index f9da2d803c18..5019d21e7ff8 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2263,6 +2263,18 @@ blk_qc_t blk_mq_submit_bio(struct bio *bio)
 }
 EXPORT_SYMBOL_GPL(blk_mq_submit_bio); /* only for request based dm */
 
+static int blk_mq_get_hw_queue_node(struct blk_mq_tag_set *set,
+		unsigned int hctx_idx)
+{
+	int node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT],
+			hctx_idx);
+
+	if (node == NUMA_NO_NODE)
+		node = set->numa_node;
+
+	return node;
+}
+
 void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
 		     unsigned int hctx_idx)
 {
@@ -2309,11 +2321,7 @@ struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set,
 					unsigned int reserved_tags)
 {
 	struct blk_mq_tags *tags;
-	int node;
-
-	node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT], hctx_idx);
-	if (node == NUMA_NO_NODE)
-		node = set->numa_node;
+	int node = blk_mq_get_hw_queue_node(set, hctx_idx);
 
 	tags = blk_mq_init_tags(nr_tags, reserved_tags, node,
 				BLK_MQ_FLAG_TO_ALLOC_POLICY(set->flags));
@@ -2367,11 +2375,7 @@ int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
 {
 	unsigned int i, j, entries_per_page;
 	size_t rq_size, left;
-	int node;
-
-	node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT], hctx_idx);
-	if (node == NUMA_NO_NODE)
-		node = set->numa_node;
+	int node = blk_mq_get_hw_queue_node(set, hctx_idx);
 
 	INIT_LIST_HEAD(&tags->page_list);
 
-- 
2.25.2