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([2001:b07:6468:f312:9066:4f2:9fbd:f90e]) by smtp.gmail.com with ESMTPSA id q8sm22064722wmg.22.2020.04.15.05.11.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Apr 2020 05:11:37 -0700 (PDT) Subject: Re: [PATCH 3/4] kvm: Replace vcpu->swait with rcuwait To: Davidlohr Bueso Cc: tglx@linutronix.de, bigeasy@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, torvalds@linux-foundation.org, will@kernel.org, joel@joelfernandes.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Paul Mackerras , kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, Davidlohr Bueso References: <20200324044453.15733-1-dave@stgolabs.net> <20200324044453.15733-4-dave@stgolabs.net> <20200414211243.7vehybdrvbzmbduu@linux-p48b> From: Paolo Bonzini Message-ID: Date: Wed, 15 Apr 2020 14:11:36 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200414211243.7vehybdrvbzmbduu@linux-p48b> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 14/04/20 23:12, Davidlohr Bueso wrote: > 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? It's up to the TIP tree people, but sending a fixed version is probably the best way to get their attention. :) I can also queue it myself (for 5.7 even) if I get an Acked-by from Peter though. Paolo