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SubjectRe: [PATCH v6 2/4] block: add runtime pm helpers
On Sun, 6 Jan 2013, Aaron Lu wrote:

> From: Lin Ming <ming.m.lin@intel.com>
>
> Add runtime pm helper functions:
>
> void blk_pm_runtime_init(struct request_queue *q, struct device *dev)
> - Initialization function for drivers to call.
>
> int blk_pre_runtime_suspend(struct request_queue *q)
> - If any requests are in the queue, return -EBUSY.
> Otherwise set q->rpm_status to RPM_SUSPENDING and return 0.
>
> void blk_post_runtime_suspend(struct request_queue *q, int err)
> - If the suspend succeeded then set q->rpm_status to RPM_SUSPENDED.
> Otherwise set it to RPM_ACTIVE.
>
> void blk_pre_runtime_resume(struct request_queue *q)
> - Set q->rpm_status to RPM_RESUMING.
>
> void blk_post_runtime_resume(struct request_queue *q, int err)
> - If the resume succeeded then set q->rpm_status to RPM_ACTIVE
> and call __blk_run_queue.
> Otherwise set q->rpm_status to RPM_SUSPENDED.
>
> [aaron.lu@intel.com: do not touch last busy in these helper functions]
> Signed-off-by: Lin Ming <ming.m.lin@intel.com>
> Signed-off-by: Aaron Lu <aaron.lu@intel.com>

> --- a/include/linux/blkdev.h
> +++ b/include/linux/blkdev.h
> @@ -19,6 +19,7 @@
> #include <linux/gfp.h>
> #include <linux/bsg.h>
> #include <linux/smp.h>
> +#include <linux/pm_runtime.h>

This doesn't belong here. Clients of the block layer don't need to
know about pm_runtime.h. Move this #include to block/blk-core.c.

Alan Stern




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