[PATCH 7/7] blk-mq: get rid of the cpumask in struct blk_mq_tags

[hch@lst.de (Christoph Hellwig)]

Unused now that NVMe sets up irq affinity before calling into blk-mq.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 block/blk-mq-tag.c     | 6 ------
 block/blk-mq-tag.h     | 1 -
 block/blk-mq.c         | 7 -------
 include/linux/blk-mq.h | 1 -
 4 files changed, 15 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 1602813..2eae3d5 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -665,11 +665,6 @@ struct blk_mq_tags *blk_mq_init_tags(unsigned int total_tags,
 	if (!tags)
 		return NULL;
 
-	if (!zalloc_cpumask_var(&tags->cpumask, GFP_KERNEL)) {
-		kfree(tags);
-		return NULL;
-	}
-
 	tags->nr_tags = total_tags;
 	tags->nr_reserved_tags = reserved_tags;
 
@@ -680,7 +675,6 @@ void blk_mq_free_tags(struct blk_mq_tags *tags)
 {
 	bt_free(&tags->bitmap_tags);
 	bt_free(&tags->breserved_tags);
-	free_cpumask_var(tags->cpumask);
 	kfree(tags);
 }
 
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index d468a79..5569641 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -44,7 +44,6 @@ struct blk_mq_tags {
 	struct list_head page_list;
 
 	int alloc_policy;
-	cpumask_var_t cpumask;
 };
 
 
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a679562..1fc42a0 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1852,7 +1852,6 @@ static void blk_mq_map_swqueue(struct request_queue *q,
 		hctx->tags = set->tags[i];
 		WARN_ON(!hctx->tags);
 
-		cpumask_copy(hctx->tags->cpumask, hctx->cpumask);
 		/*
 		 * Set the map size to the number of mapped software queues.
 		 * This is more accurate and more efficient than looping
@@ -2279,12 +2278,6 @@ static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
 	return 0;
 }
 
-struct cpumask *blk_mq_tags_cpumask(struct blk_mq_tags *tags)
-{
-	return tags->cpumask;
-}
-EXPORT_SYMBOL_GPL(blk_mq_tags_cpumask);
-
 static int blk_mq_create_mq_map(struct blk_mq_tag_set *set,
 		const struct cpumask *affinity_mask)
 {
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 29e227b..79a421e 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -197,7 +197,6 @@ struct request *blk_mq_alloc_request(struct request_queue *q, int rw,
 struct request *blk_mq_alloc_request_hctx(struct request_queue *q, int op,
 		unsigned int flags, unsigned int hctx_idx);
 struct request *blk_mq_tag_to_rq(struct blk_mq_tags *tags, unsigned int tag);
-struct cpumask *blk_mq_tags_cpumask(struct blk_mq_tags *tags);
 
 enum {
 	BLK_MQ_UNIQUE_TAG_BITS = 16,
-- 
2.1.4