linux-kernel - Re: [PATCH 3/4] kvm: Replace vcpu->swait with rcuwait

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Message-ID: <a6b23828-aa50-bea0-1d2d-03e2871239d4@redhat.com>
Date:   Wed, 25 Mar 2020 18:09:52 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Davidlohr Bueso <dave@...olabs.net>, tglx@...utronix.de
Cc:     bigeasy@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        torvalds@...ux-foundation.org, will@...nel.org,
        joel@...lfernandes.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, Paul Mackerras <paulus@...abs.org>,
        kvmarm@...ts.cs.columbia.edu, linux-mips@...r.kernel.org,
        Davidlohr Bueso <dbueso@...e.de>
Subject: Re: [PATCH 3/4] kvm: Replace vcpu->swait with rcuwait

On 24/03/20 05:44, Davidlohr Bueso wrote:
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index 71244bf87c3a..e049fcb3dffb 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -290,8 +290,7 @@ static enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer)
>  	kvm_mips_callbacks->queue_timer_int(vcpu);
>  
>  	vcpu->arch.wait = 0;
> -	if (swq_has_sleeper(&vcpu->wq))
> -		swake_up_one(&vcpu->wq);
> +	rcuwait_wake_up(&vcpu->wait)

This is missing a semicolon.  (KVM MIPS is known not to compile and will
be changed to "depends on BROKEN" in 5.7).

Paolo

>  	return kvm_mips_count_timeout(vcpu);