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

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Message-ID: <20200414211243.7vehybdrvbzmbduu@linux-p48b>
Date:   Tue, 14 Apr 2020 14:12:43 -0700
From:   Davidlohr Bueso <dave@...olabs.net>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     tglx@...utronix.de, 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 Wed, 25 Mar 2020, Paolo Bonzini wrote:

>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).

Do you want me to send another version with this fix or do you prefer
fixing it when/if picked up?

Thanks,
Davidlohr