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| author | Tina Ruchandani <ruchandani.tina@gmail.com> | 2014-10-30 11:04:53 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-11-03 01:02:55 +0100 |
| commit | db597605821fccc49876705aea5db5443d67e53e (patch) | |
| tree | e5893b616676da8feebd574df23270e0f1cfb41d /kernel/power/power.h | |
| parent | 0df1f2487d2f0d04703f142813d53615d62a1da4 (diff) | |
| download | lwn-db597605821fccc49876705aea5db5443d67e53e.tar.gz lwn-db597605821fccc49876705aea5db5443d67e53e.zip | |
PM / Hibernate: Migrate to ktime_t
This patch migrates swsusp_show_speed and its callers to using ktime_t instead
of 'struct timeval' which suffers from the y2038 problem.
Changes to swsusp_show_speed:
- use ktime_t for start and stop times
- pass start and stop times by value
Calling functions affected:
- load_image
- load_image_lzo
- save_image
- save_image_lzo
- hibernate_preallocate_memory
Design decisions:
- use ktime_t to preserve same granularity of reporting as before
- use centisecs logic as before to avoid 'div by zero' issues caused by
using seconds and nanoseconds directly
- use monotonic time (ktime_get()) since we only care about elapsed time.
Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power/power.h')
| -rw-r--r-- | kernel/power/power.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/power/power.h b/kernel/power/power.h index 2df883a9d3cb..ce9b8328a689 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -174,8 +174,7 @@ extern int hib_wait_on_bio_chain(struct bio **bio_chain); struct timeval; /* kernel/power/swsusp.c */ -extern void swsusp_show_speed(struct timeval *, struct timeval *, - unsigned int, char *); +extern void swsusp_show_speed(ktime_t, ktime_t, unsigned int, char *); #ifdef CONFIG_SUSPEND /* kernel/power/suspend.c */ |