linux-kernel - [PATCH RFT 2/3] blk-mq: Delete busy_iter

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Date:   Tue, 2 Nov 2021 19:27:34 +0800
From:   John Garry <john.garry@...wei.com>
To:     <axboe@...nel.dk>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <ming.lei@...hat.com>, <kashyap.desai@...adcom.com>,
        <hare@...e.de>, "John Garry" <john.garry@...wei.com>
Subject: [PATCH RFT 2/3] blk-mq: Delete busy_iter_fn

Typedefs busy_iter_fn and busy_tag_iter_fn are now identical, so delete
busy_iter_fn to reduce duplication.

It would be nicer to delete busy_tag_iter_fn, as the name busy_iter_fn is
less specific.

However busy_tag_iter_fn is used in many different parts of the tree,
unlike busy_iter_fn which is just use in block/, so just take the
straightforward path now, so that we could rename later treewide.

Signed-off-by: John Garry <john.garry@...wei.com>
---
 block/blk-mq-tag.c     | 6 +++---
 block/blk-mq-tag.h     | 2 +-
 include/linux/blk-mq.h | 1 -
 3 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index 0d773c44a7ec..bc233ea92adf 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -215,7 +215,7 @@ void blk_mq_put_tags(struct blk_mq_tags *tags, int *tag_array, int nr_tags)
 
 struct bt_iter_data {
 	struct blk_mq_hw_ctx *hctx;
-	busy_iter_fn *fn;
+	busy_tag_iter_fn *fn;
 	void *data;
 	bool reserved;
 };
@@ -274,7 +274,7 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
  *		bitmap_tags member of struct blk_mq_tags.
  */
 static void bt_for_each(struct blk_mq_hw_ctx *hctx, struct sbitmap_queue *bt,
-			busy_iter_fn *fn, void *data, bool reserved)
+			busy_tag_iter_fn *fn, void *data, bool reserved)
 {
 	struct bt_iter_data iter_data = {
 		.hctx = hctx,
@@ -457,7 +457,7 @@ EXPORT_SYMBOL(blk_mq_tagset_wait_completed_request);
  * called for all requests on all queues that share that tag set and not only
  * for requests associated with @q.
  */
-void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
+void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn,
 		void *priv)
 {
 	struct blk_mq_hw_ctx *hctx;
diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index df787b5a23bd..5668e28be0b7 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -28,7 +28,7 @@ extern void blk_mq_tag_resize_shared_tags(struct blk_mq_tag_set *set,
 extern void blk_mq_tag_update_sched_shared_tags(struct request_queue *q);
 
 extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
-void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
+void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn,
 		void *priv);
 void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
 		void *priv);
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index da8de0d6f99b..2344c68bff35 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -479,7 +479,6 @@ struct blk_mq_queue_data {
 	bool last;
 };
 
-typedef bool (busy_iter_fn)(struct request *, void *, bool);
 typedef bool (busy_tag_iter_fn)(struct request *, void *, bool);
 
 /**
-- 
2.17.1