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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-02-28 12:49:10 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-02-28 12:54:50 +0300 |
| commit | aaec7c03de92c35a96966631989950e6e27662db (patch) | |
| tree | ea7bca180557b531b94b6a1a3d81aaca81bd8c89 | |
| parent | 4f337faf1c55e55bdc49df13fcb3a3c45655899e (diff) | |
| download | linux-aaec7c03de92c35a96966631989950e6e27662db.tar.xz | |
KVM: x86: avoid useless copy of cpufreq policy
struct cpufreq_policy is quite big and it is not a good idea
to allocate one on the stack. Just use cpufreq_cpu_get and
cpufreq_cpu_put which is even simpler.
Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 359fcd395132..bcb6b676608b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7190,15 +7190,15 @@ static void kvm_timer_init(void) if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { #ifdef CONFIG_CPU_FREQ - struct cpufreq_policy policy; + struct cpufreq_policy *policy; int cpu; - memset(&policy, 0, sizeof(policy)); cpu = get_cpu(); - cpufreq_get_policy(&policy, cpu); - if (policy.cpuinfo.max_freq) - max_tsc_khz = policy.cpuinfo.max_freq; + policy = cpufreq_cpu_get(cpu); + if (policy && policy->cpuinfo.max_freq) + max_tsc_khz = policy->cpuinfo.max_freq; put_cpu(); + cpufreq_cpu_put(policy); #endif cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER); |