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

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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 <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-01-15 18:07:31 +01:00
parent f25e656d31
commit aab6d7ce37
1 changed files with 0 additions and 2 deletions
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arch/x86/kvm/x86.c
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@ -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 */