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libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global

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Link power management is about to be reimplemented.  Prepare for it.

* Implement sata_link_scr_lpm().

* Drop static from ata_dev_set_feature() and make it available to
  other libata files.

* Trivial whitespace adjustments.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo 2010-09-01 17:50:05 +02:00 • committed by Jeff Garzik
parent c93b263e0d
commit 1152b2617a
3 changed files with 74 additions and 5 deletions
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2
include/linux/libata.h
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@ -952,6 +952,8 @@ extern int sata_link_debounce(struct ata_link *link,
const unsigned long *params, unsigned long deadline);
extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline);
extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
bool spm_wakeup);
extern int sata_link_hardreset(struct ata_link *link,
const unsigned long *timing, unsigned long deadline,
bool *online, int (*check_ready)(struct ata_link *));