forked from mirrors/linux
bca6b067b0
Move the code for runtime power management from blk-core.c into the new source file blk-pm.c. Move the corresponding declarations from <linux/blkdev.h> into <linux/blk-pm.h>. For CONFIG_PM=n, leave out the declarations of the functions that are not used in that mode. This patch not only reduces the number of #ifdefs in the block layer core code but also reduces the size of header file <linux/blkdev.h> and hence should help to reduce the build time of the Linux kernel if CONFIG_PM is not defined. Signed-off-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Jianchao Wang <jianchao.w.wang@oracle.com> Cc: Hannes Reinecke <hare@suse.com> Cc: Johannes Thumshirn <jthumshirn@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Jens Axboe <axboe@kernel.dk>
24 lines
717 B
C
24 lines
717 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BLK_PM_H_
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#define _BLK_PM_H_
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struct device;
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struct request_queue;
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/*
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* block layer runtime pm functions
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*/
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#ifdef CONFIG_PM
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extern void blk_pm_runtime_init(struct request_queue *q, struct device *dev);
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extern int blk_pre_runtime_suspend(struct request_queue *q);
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extern void blk_post_runtime_suspend(struct request_queue *q, int err);
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extern void blk_pre_runtime_resume(struct request_queue *q);
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extern void blk_post_runtime_resume(struct request_queue *q, int err);
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extern void blk_set_runtime_active(struct request_queue *q);
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#else
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static inline void blk_pm_runtime_init(struct request_queue *q,
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struct device *dev) {}
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#endif
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#endif /* _BLK_PM_H_ */
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