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[CPUFREQ] Handle CPUs with different capabilities in acpi-cpufreq 

acpi-cpufreq checks each CPU for aperf/mperf support, but only sets a
global flag. This will cause errors if some CPUs in the system don't
support the feature. Check boot_cpu_has() instead in order to make sure
that all CPUs support it.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Jones <davej@redhat.com>
wifi-calibration
Matthew Garrett 2011-07-13 17:58:32 -04:00 committed by Dave Jones
parent 8d86e5f914
commit 92e03c41a4
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/acpi-cpufreq.c
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@ -655,7 +655,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
acpi_processor_notify_smm(THIS_MODULE);
/* Check for APERF/MPERF support in hardware */
if (cpu_has(c, X86_FEATURE_APERFMPERF))
if (boot_cpu_has(X86_FEATURE_APERFMPERF))
acpi_cpufreq_driver.getavg = cpufreq_get_measured_perf;
pr_debug("CPU%u - ACPI performance management activated.\n", cpu);