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| author | Bart Van Assche <bvanassche@acm.org> | 2018-09-27 00:01:03 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-09-27 00:11:28 +0300 |
| commit | bca6b067b0b269a7b8ba129e2a918309ca8b4a55 (patch) | |
| tree | 8c41db994ddaf2023d881189cd947fce24f3b7d3 /include/linux/blk-pm.h | |
| parent | 3cfa210bf3fe0803cca17f3775d8cf2360d5f443 (diff) | |
| download | linux-bca6b067b0b269a7b8ba129e2a918309ca8b4a55.tar.xz | |
block: Move power management code into a new source file
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>
Diffstat (limited to 'include/linux/blk-pm.h')
| -rw-r--r-- | include/linux/blk-pm.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/linux/blk-pm.h b/include/linux/blk-pm.h new file mode 100644 index 000000000000..b80c65aba249 --- /dev/null +++ b/include/linux/blk-pm.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _BLK_PM_H_ +#define _BLK_PM_H_ + +struct device; +struct request_queue; + +/* + * block layer runtime pm functions + */ +#ifdef CONFIG_PM +extern void blk_pm_runtime_init(struct request_queue *q, struct device *dev); +extern int blk_pre_runtime_suspend(struct request_queue *q); +extern void blk_post_runtime_suspend(struct request_queue *q, int err); +extern void blk_pre_runtime_resume(struct request_queue *q); +extern void blk_post_runtime_resume(struct request_queue *q, int err); +extern void blk_set_runtime_active(struct request_queue *q); +#else +static inline void blk_pm_runtime_init(struct request_queue *q, + struct device *dev) {} +#endif + +#endif /* _BLK_PM_H_ */ |