On Mon 2017-06-05 12:31:14, Mark Salyzyn wrote: > Permits power state and battery life diagnosis. > > Signed-off-by: Todd Poynor <[email protected]> > Signed-off-by: Mark Salyzyn <[email protected]>
I don't particulary like it (RTC is slow on PC class machines), but I guess the information is useful. Acked-by: Pavel Machek <[email protected]> > --- > kernel/power/suspend.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c > index c0248c74d6d4..464175f04bc5 100644 > --- a/kernel/power/suspend.c > +++ b/kernel/power/suspend.c > @@ -26,6 +26,7 @@ > #include <linux/suspend.h> > #include <linux/syscore_ops.h> > #include <linux/ftrace.h> > +#include <linux/rtc.h> > #include <trace/events/power.h> > #include <linux/compiler.h> > #include <linux/moduleparam.h> > @@ -563,6 +564,18 @@ static int enter_state(suspend_state_t state) > return error; > } > > +static void pm_suspend_marker(char *annotation) > +{ > + struct timespec ts; > + struct rtc_time tm; > + > + getnstimeofday(&ts); > + rtc_time_to_tm(ts.tv_sec, &tm); > + pr_info("PM: suspend %s %d-%02d-%02d %02d:%02d:%02d.%09lu UTC\n", > + annotation, tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, > + tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec); > +} > + > /** > * pm_suspend - Externally visible function for suspending the system. > * @state: System sleep state to enter. > @@ -577,6 +590,7 @@ int pm_suspend(suspend_state_t state) > if (state <= PM_SUSPEND_ON || state >= PM_SUSPEND_MAX) > return -EINVAL; > > + pm_suspend_marker("entry"); > error = enter_state(state); > if (error) { > suspend_stats.fail++; > @@ -584,6 +598,7 @@ int pm_suspend(suspend_state_t state) > } else { > suspend_stats.success++; > } > + pm_suspend_marker("exit"); > return error; > } > EXPORT_SYMBOL(pm_suspend); -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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