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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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cae740a04b
The struct blk_mq_hw_ctx pointer argument in blk_mq_put_tag(), blk_mq_poll_nsecs(), and blk_mq_poll_hybrid_sleep() is unused, so remove it. Overall obj code size shows a minor reduction, before: text data bss dec hex filename 27306 1312 0 28618 6fca block/blk-mq.o 4303 272 0 4575 11df block/blk-mq-tag.o after: 27282 1312 0 28594 6fb2 block/blk-mq.o 4311 272 0 4583 11e7 block/blk-mq-tag.o Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: John Garry <john.garry@huawei.com> -- This minor patch had been carried as part of the blk-mq shared tags RFC, I'd rather not carry it anymore as it required rebasing, so now or never.. Signed-off-by: Jens Axboe <axboe@kernel.dk>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef INT_BLK_MQ_TAG_H
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#define INT_BLK_MQ_TAG_H
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#include "blk-mq.h"
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/*
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* Tag address space map.
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*/
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struct blk_mq_tags {
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unsigned int nr_tags;
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unsigned int nr_reserved_tags;
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atomic_t active_queues;
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struct sbitmap_queue bitmap_tags;
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struct sbitmap_queue breserved_tags;
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struct request **rqs;
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struct request **static_rqs;
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struct list_head page_list;
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};
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extern struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags, unsigned int reserved_tags, int node, int alloc_policy);
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extern void blk_mq_free_tags(struct blk_mq_tags *tags);
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extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
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extern void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
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unsigned int tag);
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extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
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struct blk_mq_tags **tags,
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unsigned int depth, bool can_grow);
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extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
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void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
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void *priv);
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static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
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struct blk_mq_hw_ctx *hctx)
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{
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if (!hctx)
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return &bt->ws[0];
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return sbq_wait_ptr(bt, &hctx->wait_index);
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}
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enum {
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BLK_MQ_TAG_FAIL = -1U,
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BLK_MQ_TAG_MIN = 1,
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BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1,
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};
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extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
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extern void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
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static inline bool blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
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{
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if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
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return false;
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return __blk_mq_tag_busy(hctx);
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}
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static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
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{
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if (!(hctx->flags & BLK_MQ_F_TAG_SHARED))
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return;
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__blk_mq_tag_idle(hctx);
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}
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/*
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* This helper should only be used for flush request to share tag
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* with the request cloned from, and both the two requests can't be
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* in flight at the same time. The caller has to make sure the tag
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* can't be freed.
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*/
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static inline void blk_mq_tag_set_rq(struct blk_mq_hw_ctx *hctx,
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unsigned int tag, struct request *rq)
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{
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hctx->tags->rqs[tag] = rq;
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}
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static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
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unsigned int tag)
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{
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return tag < tags->nr_reserved_tags;
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}
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#endif
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