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OpenCloudOS-Kernel
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kvm: x86: hyperv: delete dead code in kvm_hv_hypercall() 

"rep_done" is always zero so the "(((u64)rep_done & 0xfff) << 32)"
expression is just zero.  We can remove the "res" temporary variable as
well and just use "ret" directly.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Dan Carpenter 2018-03-17 14:48:27 +03:00 committed by Paolo Bonzini
parent 81811c162d
commit d32ef547fd
1 changed files with 7 additions and 8 deletions
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15
arch/x86/kvm/hyperv.c
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@ -1307,8 +1307,8 @@ static u16 kvm_hvcall_signal_event(struct kvm_vcpu *vcpu, bool fast, u64 param)
int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
{
u64 param, ingpa, outgpa, ret;
uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
u64 param, ingpa, outgpa, ret = HV_STATUS_SUCCESS;
uint16_t code, rep_idx, rep_cnt;
bool fast, longmode;
/*
@ -1347,7 +1347,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
/* Hypercall continuation is not supported yet */
if (rep_cnt || rep_idx) {
res = HV_STATUS_INVALID_HYPERCALL_CODE;
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
goto set_result;
}
@ -1356,14 +1356,14 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
kvm_vcpu_on_spin(vcpu, true);
break;
case HVCALL_SIGNAL_EVENT:
res = kvm_hvcall_signal_event(vcpu, fast, ingpa);
if (res != HV_STATUS_INVALID_PORT_ID)
ret = kvm_hvcall_signal_event(vcpu, fast, ingpa);
if (ret != HV_STATUS_INVALID_PORT_ID)
break;
/* maybe userspace knows this conn_id: fall through */
case HVCALL_POST_MESSAGE:
/* don't bother userspace if it has no way to handle it */
if (!vcpu_to_synic(vcpu)->active) {
res = HV_STATUS_INVALID_HYPERCALL_CODE;
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
break;
}
vcpu->run->exit_reason = KVM_EXIT_HYPERV;
@ -1375,12 +1375,11 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
kvm_hv_hypercall_complete_userspace;
return 0;
default:
res = HV_STATUS_INVALID_HYPERCALL_CODE;
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
break;
}
set_result:
ret = res | (((u64)rep_done & 0xfff) << 32);
kvm_hv_hypercall_set_result(vcpu, ret);
return 1;
}