diff options
| author | Ingo Molnar <mingo@elte.hu> | 2009-02-13 09:34:07 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-13 09:34:07 +0100 |
| commit | e9c4ffb11f0b19005b5b9dc8481687a3637e5887 (patch) | |
| tree | 7007f2ff846b9b057c5cd7c25e8b82e49f9b4b63 /arch/x86/kernel/hpet.c | |
| parent | 4bcf349a0f90d1e69eb35c6df0fa285c886c1cd6 (diff) | |
| parent | 071a0bc2ceace31266836801510879407a3701fa (diff) | |
Merge branch 'linus' into perfcounters/core
Conflicts:
arch/x86/kernel/acpi/boot.c
Diffstat (limited to 'arch/x86/kernel/hpet.c')
| -rw-r--r-- | arch/x86/kernel/hpet.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 64d5ad0b8ad..388254f69a2 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -897,7 +897,7 @@ static unsigned long hpet_rtc_flags; static int hpet_prev_update_sec; static struct rtc_time hpet_alarm_time; static unsigned long hpet_pie_count; -static unsigned long hpet_t1_cmp; +static u32 hpet_t1_cmp; static unsigned long hpet_default_delta; static unsigned long hpet_pie_delta; static unsigned long hpet_pie_limit; @@ -905,6 +905,14 @@ static unsigned long hpet_pie_limit; static rtc_irq_handler irq_handler; /* + * Check that the hpet counter c1 is ahead of the c2 + */ +static inline int hpet_cnt_ahead(u32 c1, u32 c2) +{ + return (s32)(c2 - c1) < 0; +} + +/* * Registers a IRQ handler. */ int hpet_register_irq_handler(rtc_irq_handler handler) @@ -1075,7 +1083,7 @@ static void hpet_rtc_timer_reinit(void) hpet_t1_cmp += delta; hpet_writel(hpet_t1_cmp, HPET_T1_CMP); lost_ints++; - } while ((long)(hpet_readl(HPET_COUNTER) - hpet_t1_cmp) > 0); + } while (!hpet_cnt_ahead(hpet_t1_cmp, hpet_readl(HPET_COUNTER))); if (lost_ints) { if (hpet_rtc_flags & RTC_PIE) |