diff options
Diffstat (limited to 'arch/x86_64/kernel/tsc.c')
| -rw-r--r-- | arch/x86_64/kernel/tsc.c | 39 |
1 files changed, 11 insertions, 28 deletions
diff --git a/arch/x86_64/kernel/tsc.c b/arch/x86_64/kernel/tsc.c index e850aa01e1b3..9b76b03d0600 100644 --- a/arch/x86_64/kernel/tsc.c +++ b/arch/x86_64/kernel/tsc.c @@ -61,25 +61,9 @@ inline int check_tsc_unstable(void) * first tick after the change will be slightly wrong. */ -#include <linux/workqueue.h> - -static unsigned int cpufreq_delayed_issched = 0; -static unsigned int cpufreq_init = 0; -static struct work_struct cpufreq_delayed_get_work; - -static void handle_cpufreq_delayed_get(struct work_struct *v) -{ - unsigned int cpu; - for_each_online_cpu(cpu) { - cpufreq_get(cpu); - } - cpufreq_delayed_issched = 0; -} - -static unsigned int ref_freq = 0; -static unsigned long loops_per_jiffy_ref = 0; - -static unsigned long tsc_khz_ref = 0; +static unsigned int ref_freq; +static unsigned long loops_per_jiffy_ref; +static unsigned long tsc_khz_ref; static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val, void *data) @@ -125,10 +109,8 @@ static struct notifier_block time_cpufreq_notifier_block = { static int __init cpufreq_tsc(void) { - INIT_WORK(&cpufreq_delayed_get_work, handle_cpufreq_delayed_get); - if (!cpufreq_register_notifier(&time_cpufreq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER)) - cpufreq_init = 1; + cpufreq_register_notifier(&time_cpufreq_notifier_block, + CPUFREQ_TRANSITION_NOTIFIER); return 0; } @@ -153,17 +135,18 @@ __cpuinit int unsynchronized_tsc(void) #endif /* Most intel systems have synchronized TSCs except for multi node systems */ - if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) { + if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) { #ifdef CONFIG_ACPI /* But TSC doesn't tick in C3 so don't use it there */ - if (acpi_gbl_FADT.header.length > 0 && acpi_gbl_FADT.C3latency < 1000) + if (acpi_gbl_FADT.header.length > 0 && + acpi_gbl_FADT.C3latency < 1000) return 1; #endif - return 0; + return 0; } - /* Assume multi socket systems are not synchronized */ - return num_present_cpus() > 1; + /* Assume multi socket systems are not synchronized */ + return num_present_cpus() > 1; } int __init notsc_setup(char *s) |