[PATCH V2 8/8] blk-mq: remove blk_mq_tagset_busy_iter

Jianchao Wang
2019-03-25T05:48:11Z

As nobody uses blk_mq_tagset_busy_iter, remove it.

Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com>
---
block/blk-mq-tag.c | 95 --------------------------------------------------
include/linux/blk-mq.h | 2 --
2 files changed, 97 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index bf7b235..a6a28dd 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -279,101 +279,6 @@ static void bt_for_each(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
sbitmap_for_each_set(&bt->sb, bt_iter, &iter_data);
}

-struct bt_tags_iter_data {
- struct blk_mq_tags *tags;
- busy_tag_iter_fn *fn;
- void *data;
- bool reserved;
-};
-
-static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
-{
- struct bt_tags_iter_data *iter_data = data;
- struct blk_mq_tags *tags = iter_data->tags;
- bool reserved = iter_data->reserved;
- struct request *rq;
-
- if (!reserved)
- bitnr += tags->nr_reserved_tags;
-
- /*
- * We can hit rq == NULL here, because the tagging functions
- * test and set the bit before assining ->rqs[].
- */
- rq = tags->rqs[bitnr];
- if (rq && blk_mq_request_started(rq))
- return iter_data->fn(rq, iter_data->data, reserved);
-
- return true;
-}
-
-/**
- * bt_tags_for_each - iterate over the requests in a tag map
- * @tags: Tag map to iterate over.
- * @bt: sbitmap to examine. This is either the breserved_tags member
- * or the bitmap_tags member of struct blk_mq_tags.
- * @fn: Pointer to the function that will be called for each started
- * request. @fn will be called as follows: @fn(rq, @data,
- * @reserved) where rq is a pointer to a request. Return true
- * to continue iterating tags, false to stop.
- * @data: Will be passed as second argument to @fn.
- * @reserved: Indicates whether @bt is the breserved_tags member or the
- * bitmap_tags member of struct blk_mq_tags.
- */
-static void bt_tags_for_each(struct blk_mq_tags *tags, struct sbitmap_queue *bt,
- busy_tag_iter_fn *fn, void *data, bool reserved)
-{
- struct bt_tags_iter_data iter_data = {
- .tags = tags,
- .fn = fn,
- .data = data,
- .reserved = reserved,
- };
-
- if (tags->rqs)
- sbitmap_for_each_set(&bt->sb, bt_tags_iter, &iter_data);
-}
-
-/**
- * blk_mq_all_tag_busy_iter - iterate over all started requests in a tag map
- * @tags: Tag map to iterate over.
- * @fn: Pointer to the function that will be called for each started
- * request. @fn will be called as follows: @fn(rq, @priv,
- * reserved) where rq is a pointer to a request. 'reserved'
- * indicates whether or not @rq is a reserved request. Return
- * true to continue iterating tags, false to stop.
- * @priv: Will be passed as second argument to @fn.
- */
-static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags,
- busy_tag_iter_fn *fn, void *priv)
-{
- if (tags->nr_reserved_tags)
- bt_tags_for_each(tags, &tags->breserved_tags, fn, priv, true);
- bt_tags_for_each(tags, &tags->bitmap_tags, fn, priv, false);
-}
-
-/**
- * blk_mq_tagset_busy_iter - iterate over all started requests in a tag set
- * @tagset: Tag set to iterate over.
- * @fn: Pointer to the function that will be called for each started
- * request. @fn will be called as follows: @fn(rq, @priv,
- * reserved) where rq is a pointer to a request. 'reserved'
- * indicates whether or not @rq is a reserved request. Return
- * true to continue iterating tags, false to stop.
- * @priv: Will be passed as second argument to @fn.
- */
-void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
- busy_tag_iter_fn *fn, void *priv)
-{
- int i;
-
- for (i = 0; i < tagset->nr_hw_queues; i++) {
- if (tagset->tags && tagset->tags[i])
- blk_mq_all_tag_busy_iter(tagset->tags[i], fn, priv);
- }
-}
-EXPORT_SYMBOL(blk_mq_tagset_busy_iter);
-
/**
* __blk_mq_queue_tag_busy_iter - iterate over all busy or inflight tags
* @q: Request queue to examine.
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index dff9bb6..3ba8001 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -318,8 +318,6 @@ void blk_mq_unquiesce_queue(struct request_queue *q);
void blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);
bool blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
void blk_mq_run_hw_queues(struct request_queue *q, bool async);
-void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
- busy_tag_iter_fn *fn, void *priv);
void blk_mq_queue_tag_inflight_iter(struct request_queue *q,
busy_iter_fn *fn, void *priv);
void blk_mq_freeze_queue(struct request_queue *q);
--
2.7.4