diff options
Diffstat (limited to 'arch/x86/kernel/tsc.c')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 75b939d39..fa820b7de 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -37,7 +37,7 @@ static int __read_mostly tsc_unstable; /* native_sched_clock() is called before tsc_init(), so we must start with the TSC soft disabled to prevent - erroneous rdtsc usage on !cpu_has_tsc processors */ + erroneous rdtsc usage on !boot_cpu_has(X86_FEATURE_TSC) processors */ static int __read_mostly tsc_disabled = -1; static DEFINE_STATIC_KEY_FALSE(__use_tsc); @@ -839,15 +839,15 @@ int recalibrate_cpu_khz(void) #ifndef CONFIG_SMP unsigned long cpu_khz_old = cpu_khz; - if (cpu_has_tsc) { - tsc_khz = x86_platform.calibrate_tsc(); - cpu_khz = tsc_khz; - cpu_data(0).loops_per_jiffy = - cpufreq_scale(cpu_data(0).loops_per_jiffy, - cpu_khz_old, cpu_khz); - return 0; - } else + if (!boot_cpu_has(X86_FEATURE_TSC)) return -ENODEV; + + tsc_khz = x86_platform.calibrate_tsc(); + cpu_khz = tsc_khz; + cpu_data(0).loops_per_jiffy = cpufreq_scale(cpu_data(0).loops_per_jiffy, + cpu_khz_old, cpu_khz); + + return 0; #else return -ENODEV; #endif @@ -927,9 +927,6 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val, struct cpufreq_freqs *freq = data; unsigned long *lpj; - if (cpu_has(&cpu_data(freq->cpu), X86_FEATURE_CONSTANT_TSC)) - return 0; - lpj = &boot_cpu_data.loops_per_jiffy; #ifdef CONFIG_SMP if (!(freq->flags & CPUFREQ_CONST_LOOPS)) @@ -959,9 +956,9 @@ static struct notifier_block time_cpufreq_notifier_block = { .notifier_call = time_cpufreq_notifier }; -static int __init cpufreq_tsc(void) +static int __init cpufreq_register_tsc_scaling(void) { - if (!cpu_has_tsc) + if (!boot_cpu_has(X86_FEATURE_TSC)) return 0; if (boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) return 0; @@ -970,7 +967,7 @@ static int __init cpufreq_tsc(void) return 0; } -core_initcall(cpufreq_tsc); +core_initcall(cpufreq_register_tsc_scaling); #endif /* CONFIG_CPU_FREQ */ @@ -1086,7 +1083,7 @@ static void __init check_system_tsc_reliable(void) */ int unsynchronized_tsc(void) { - if (!cpu_has_tsc || tsc_unstable) + if (!boot_cpu_has(X86_FEATURE_TSC) || tsc_unstable) return 1; #ifdef CONFIG_SMP @@ -1210,7 +1207,7 @@ out: static int __init init_tsc_clocksource(void) { - if (!cpu_has_tsc || tsc_disabled > 0 || !tsc_khz) + if (!boot_cpu_has(X86_FEATURE_TSC) || tsc_disabled > 0 || !tsc_khz) return 0; if (tsc_clocksource_reliable) @@ -1247,7 +1244,7 @@ void __init tsc_init(void) u64 lpj; int cpu; - if (!cpu_has_tsc) { + if (!boot_cpu_has(X86_FEATURE_TSC)) { setup_clear_cpu_cap(X86_FEATURE_TSC_DEADLINE_TIMER); return; } |