Re: [PATCH] KVM: x86/mmu: remove unnecessary flush_workqueue()

[Sean Christopherson]

On Fri, Apr 01, 2022, cgel.zte@xxxxxxxxx wrote:
> From: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
> 
> All work currently pending will be done first by calling destroy_workqueue,
> so there is unnecessary to flush it explicitly.
> 
> Reported-by: Zeal Robot <zealci@xxxxxxxxxx>

Good bot :-)

> Signed-off-by: Lv Ruyi <lv.ruyi@xxxxxxxxxx>
> ---
>  arch/x86/kvm/mmu/tdp_mmu.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
> index a2f9a34a0168..b822677ee3da 100644
> --- a/arch/x86/kvm/mmu/tdp_mmu.c
> +++ b/arch/x86/kvm/mmu/tdp_mmu.c
> @@ -51,7 +51,6 @@ void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm)
>  	if (!kvm->arch.tdp_mmu_enabled)
>  		return;
>  
> -	flush_workqueue(kvm->arch.tdp_mmu_zap_wq);

Might be worth adding a comment calling out that this drains the queue.  Either way,

Reviewed-by: Sean Christopherson <seanjc@xxxxxxxxxx>