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authorPaolo Bonzini <pbonzini@redhat.com>2020-02-28 10:49:10 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2020-02-28 10:54:50 +0100
commitaaec7c03de92c35a96966631989950e6e27662db (patch)
treeea7bca180557b531b94b6a1a3d81aaca81bd8c89
parent4f337faf1c55e55bdc49df13fcb3a3c45655899e (diff)
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.c10
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);

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