KVM: remove useless write to vcpu->hv_clock.tsc_timestamp

After the previous patch from Marcelo, the comment before this write became obsolete. In fact, the write is unnecessary. The calls to kvm_write_tsc ultimately result in a master clock update as soon as all TSCs agree and the master clock is re-enabled. This master clock update will rewrite tsc_timestamp. So, together with the comment, delete the dead write too. Reviewed-by: Marcelo Tosatti <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
Baughn · Jan 15, 2014 · aab6d7c · aab6d7c
1 parent f25e656
commit aab6d7c
Showing 1 changed file with 0 additions and 2 deletions.
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
@@ -1278,8 +1278,6 @@ void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr)
 	kvm->arch.last_tsc_write = data;
 	kvm->arch.last_tsc_khz = vcpu->arch.virtual_tsc_khz;
 
-	/* Reset of TSC must disable overshoot protection below */
-	vcpu->arch.hv_clock.tsc_timestamp = 0;
 	vcpu->arch.last_guest_tsc = data;
 
 	/* Keep track of which generation this VCPU has synchronized to */