39 lines
1 KiB
C
39 lines
1 KiB
C
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#ifndef BLK_STAT_H
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#define BLK_STAT_H
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/*
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* ~0.13s window as a power-of-2 (2^27 nsecs)
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*/
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#define BLK_STAT_NSEC 134217728ULL
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#define BLK_STAT_MASK ~(BLK_STAT_NSEC - 1)
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#ifdef CONFIG_WBT
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void blk_stat_add(struct blk_rq_stat *, struct request *);
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void blk_hctx_stat_get(struct blk_mq_hw_ctx *, struct blk_rq_stat *);
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void blk_queue_stat_get(struct request_queue *, struct blk_rq_stat *);
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void blk_stat_clear(struct request_queue *q);
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void blk_stat_init(struct blk_rq_stat *);
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void blk_stat_sum(struct blk_rq_stat *, struct blk_rq_stat *);
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#else
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static inline void blk_stat_add(struct blk_rq_stat *stat, struct request *rq)
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{
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}
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static inline void blk_hctx_stat_get(struct blk_mq_hw_ctx *hctx, struct blk_rq_stat *dst)
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{
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}
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static inline void blk_queue_stat_get(struct request_queue *q, struct blk_rq_stat *dst)
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{
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}
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static inline void blk_stat_clear(struct request_queue *q)
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{
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}
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static inline void blk_stat_init(struct blk_rq_stat *stat)
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{
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}
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static inline void blk_stat_sum(struct blk_rq_stat *dst, struct blk_rq_stat *src)
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{
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}
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#endif
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#endif
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