diff options
| author | Shaohua Li <shaohua.li@intel.com> | 2005-09-03 15:57:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@evo.osdl.org> | 2005-09-05 00:06:18 -0700 |
| commit | c3c433e4f33afe255389ba3b1a003dc8deb3de9a (patch) | |
| tree | 071304e15e21e0a93c17050000a682f4ae1a98c1 /arch/i386/kernel/timers/timer_hpet.c | |
| parent | 57c4ce3cbfba1bb0da7f37b9328a713cbd5d0919 (diff) | |
[PATCH] add suspend/resume for timer
The timers lack .suspend/.resume methods. Because of this, jiffies got a
big compensation after a S3 resume. And then softlockup watchdog reports
an oops. This occured with HPET enabled, but it's also possible for other
timers.
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/timers/timer_hpet.c')
| -rw-r--r-- | arch/i386/kernel/timers/timer_hpet.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/i386/kernel/timers/timer_hpet.c b/arch/i386/kernel/timers/timer_hpet.c index cbb3f221ced8..001de97c9e4a 100644 --- a/arch/i386/kernel/timers/timer_hpet.c +++ b/arch/i386/kernel/timers/timer_hpet.c @@ -181,6 +181,19 @@ static int __init init_hpet(char* override) return 0; } +static int hpet_resume(void) +{ + write_seqlock(&monotonic_lock); + /* Assume this is the last mark offset time */ + rdtsc(last_tsc_low, last_tsc_high); + + if (hpet_use_timer) + hpet_last = hpet_readl(HPET_T0_CMP) - hpet_tick; + else + hpet_last = hpet_readl(HPET_COUNTER); + write_sequnlock(&monotonic_lock); + return 0; +} /************************************************************/ /* tsc timer_opts struct */ @@ -190,6 +203,7 @@ static struct timer_opts timer_hpet __read_mostly = { .get_offset = get_offset_hpet, .monotonic_clock = monotonic_clock_hpet, .delay = delay_hpet, + .resume = hpet_resume, }; struct init_timer_opts __initdata timer_hpet_init = { |