diff options
Diffstat (limited to 'arch/x86_64/kernel/time.c')
| -rw-r--r-- | arch/x86_64/kernel/time.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c index 35a896ef4c35..fdaddc4e5284 100644 --- a/arch/x86_64/kernel/time.c +++ b/arch/x86_64/kernel/time.c @@ -1089,6 +1089,7 @@ static unsigned long PIE_freq = DEFAULT_RTC_INT_FREQ; static unsigned long PIE_count; static unsigned long hpet_rtc_int_freq; /* RTC interrupt frequency */ +static unsigned int hpet_t1_cmp; /* cached comparator register */ int is_hpet_enabled(void) { @@ -1125,6 +1126,7 @@ int hpet_rtc_timer_init(void) cnt = hpet_readl(HPET_COUNTER); cnt += ((hpet_tick*HZ)/hpet_rtc_int_freq); hpet_writel(cnt, HPET_T1_CMP); + hpet_t1_cmp = cnt; local_irq_restore(flags); cfg = hpet_readl(HPET_T1_CFG); @@ -1152,9 +1154,10 @@ static void hpet_rtc_timer_reinit(void) hpet_rtc_int_freq = DEFAULT_RTC_INT_FREQ; /* It is more accurate to use the comparator value than current count.*/ - cnt = hpet_readl(HPET_T1_CMP); + cnt = hpet_t1_cmp; cnt += hpet_tick*HZ/hpet_rtc_int_freq; hpet_writel(cnt, HPET_T1_CMP); + hpet_t1_cmp = cnt; } /* |