From: "Jan Beulich" Like previously done for i386, get the x86_64 watchdog tick calculation into a state where it can also be used on CPUs with frequencies beyond 4GHz. Signed-off-by: Jan Beulich Cc: Andi Kleen Signed-off-by: Andrew Morton --- arch/x86_64/kernel/nmi.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff -puN arch/x86_64/kernel/nmi.c~x86_64-nmi-watchdog-frequency-calculation-adjustments arch/x86_64/kernel/nmi.c --- 25/arch/x86_64/kernel/nmi.c~x86_64-nmi-watchdog-frequency-calculation-adjustments Wed Sep 7 14:58:02 2005 +++ 25-akpm/arch/x86_64/kernel/nmi.c Wed Sep 7 14:58:02 2005 @@ -367,7 +367,7 @@ static void setup_k7_watchdog(void) | K7_NMI_EVENT; wrmsr(MSR_K7_EVNTSEL0, evntsel, 0); - wrmsr(MSR_K7_PERFCTR0, -(cpu_khz/nmi_hz*1000), -1); + wrmsrl(MSR_K7_PERFCTR0, -((u64)cpu_khz * 1000 / nmi_hz)); apic_write(APIC_LVTPC, APIC_DM_NMI); evntsel |= K7_EVNTSEL_ENABLE; wrmsr(MSR_K7_EVNTSEL0, evntsel, 0); @@ -408,8 +408,8 @@ static int setup_p4_watchdog(void) wrmsr(MSR_P4_CRU_ESCR0, P4_NMI_CRU_ESCR0, 0); wrmsr(MSR_P4_IQ_CCCR0, P4_NMI_IQ_CCCR0 & ~P4_CCCR_ENABLE, 0); - Dprintk("setting P4_IQ_COUNTER0 to 0x%08lx\n", -(cpu_khz/nmi_hz*1000)); - wrmsr(MSR_P4_IQ_COUNTER0, -(cpu_khz/nmi_hz*1000), -1); + Dprintk("setting P4_IQ_COUNTER0 to 0x%08lx\n", -(cpu_khz * 1000UL / nmi_hz)); + wrmsrl(MSR_P4_IQ_COUNTER0, -((u64)cpu_khz * 1000 / nmi_hz)); apic_write(APIC_LVTPC, APIC_DM_NMI); wrmsr(MSR_P4_IQ_CCCR0, nmi_p4_cccr_val, 0); return 1; @@ -507,7 +507,7 @@ void nmi_watchdog_tick (struct pt_regs * wrmsr(MSR_P4_IQ_CCCR0, nmi_p4_cccr_val, 0); apic_write(APIC_LVTPC, APIC_DM_NMI); } - wrmsr(nmi_perfctr_msr, -(cpu_khz/nmi_hz*1000), -1); + wrmsrl(nmi_perfctr_msr, -((u64)cpu_khz * 1000 / nmi_hz)); } } _