Re: [PATCH v2] KVM: VMX: Add 'else' to split mutually exclusive case

[Vitaly Kuznetsov <vkuznets@redhat.com>]

linmiaohe <linmiaohe@huawei.com> writes:

> From: Miaohe Lin <linmiaohe@huawei.com>
>
> Each if branch in handle_external_interrupt_irqoff() is mutually
> exclusive. Add 'else' to make it clear and also avoid some unnecessary
> check.
>
> Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
> ---
> v1->v2:
> add braces to all if branches
> ---
>  arch/x86/kvm/vmx/vmx.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> index 9a6664886f2e..a13368b2719c 100644
> --- a/arch/x86/kvm/vmx/vmx.c
> +++ b/arch/x86/kvm/vmx/vmx.c
> @@ -6176,15 +6176,13 @@ static void handle_exception_nmi_irqoff(struct vcpu_vmx *vmx)
>  	vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
>  
>  	/* if exit due to PF check for async PF */
> -	if (is_page_fault(vmx->exit_intr_info))
> +	if (is_page_fault(vmx->exit_intr_info)) {
>  		vmx->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
> -
>  	/* Handle machine checks before interrupts are enabled */
> -	if (is_machine_check(vmx->exit_intr_info))
> +	} else if (is_machine_check(vmx->exit_intr_info)) {
>  		kvm_machine_check();
> -
>  	/* We need to handle NMIs before interrupts are enabled */
> -	if (is_nmi(vmx->exit_intr_info)) {
> +	} else if (is_nmi(vmx->exit_intr_info)) {
>  		kvm_before_interrupt(&vmx->vcpu);
>  		asm("int $2");
>  		kvm_after_interrupt(&vmx->vcpu);

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly