[PATCH v8 07/18] blk-mq: Relocate hctx_may_queue()

John Garry
2020-08-19T15:26:23Z

blk-mq.h and blk-mq-tag.h include on each other, which is less than ideal.

Locate hctx_may_queue() to blk-mq.h, as it is not really tag specific code.

In this way, we can drop the blk-mq-tag.h include of blk-mq.h

Signed-off-by: John Garry <john.garry@huawei.com>
---
block/blk-mq-tag.h | 33 ---------------------------------
block/blk-mq.h | 32 ++++++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 33 deletions(-)

diff --git a/block/blk-mq-tag.h b/block/blk-mq-tag.h
index 8f4cce52ba2d..7d3e6b333a4a 100644
--- a/block/blk-mq-tag.h
+++ b/block/blk-mq-tag.h
@@ -2,8 +2,6 @@
#ifndef INT_BLK_MQ_TAG_H
#define INT_BLK_MQ_TAG_H

-#include "blk-mq.h"
-
/*
* Tag address space map.
*/
@@ -81,37 +79,6 @@ static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
__blk_mq_tag_idle(hctx);
}

-/*
- * For shared tag users, we track the number of currently active users
- * and attempt to provide a fair share of the tag depth for each of them.
- */
-static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
- struct sbitmap_queue *bt)
-{
- unsigned int depth, users;
-
- if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
- return true;
- if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
- return true;
-
- /*
- * Don't try dividing an ant
- */
- if (bt->sb.depth == 1)
- return true;
-
- users = atomic_read(&hctx->tags->active_queues);
- if (!users)
- return true;
-
- /*
- * Allow at least some tags
- */
- depth = max((bt->sb.depth + users - 1) / users, 4U);
- return atomic_read(&hctx->nr_active) < depth;
-}
-
static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
unsigned int tag)
{
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 3acdb56065e1..56dc37c21908 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -259,4 +259,36 @@ static inline struct blk_plug *blk_mq_plug(struct request_queue *q,
return NULL;
}

+/*
+ * For shared tag users, we track the number of currently active users
+ * and attempt to provide a fair share of the tag depth for each of them.
+ */
+static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
+ struct sbitmap_queue *bt)
+{
+ unsigned int depth, users;
+
+ if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
+ return true;
+ if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
+ return true;
+
+ /*
+ * Don't try dividing an ant
+ */
+ if (bt->sb.depth == 1)
+ return true;
+
+ users = atomic_read(&hctx->tags->active_queues);
+ if (!users)
+ return true;
+
+ /*
+ * Allow at least some tags
+ */
+ depth = max((bt->sb.depth + users - 1) / users, 4U);
+ return atomic_read(&hctx->nr_active) < depth;
+}
+
+
#endif
--
2.26.2