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([2001:b07:6468:f312:9541:9439:cb0f:89c]) by smtp.gmail.com with ESMTPSA id o9sm8786762wrs.1.2020.07.10.00.48.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 10 Jul 2020 00:48:34 -0700 (PDT) Subject: Re: [PATCH v6 1/5] KVM: s390: clean up redundant 'kvm_run' parameters To: Christian Borntraeger , Tianjia Zhang , tsbogend@alpha.franken.de, paulus@ozlabs.org, mpe@ellerman.id.au, benh@kernel.crashing.org, frankja@linux.ibm.com, david@redhat.com, cohuck@redhat.com, heiko.carstens@de.ibm.com, gor@linux.ibm.com, sean.j.christopherson@intel.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, maz@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, christoffer.dall@arm.com, peterx@redhat.com, thuth@redhat.com, chenhuacai@gmail.com Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200623131418.31473-1-tianjia.zhang@linux.alibaba.com> <20200623131418.31473-2-tianjia.zhang@linux.alibaba.com> From: Paolo Bonzini Message-ID: <2e986527-1585-e1b4-1251-ef36ac3bd233@redhat.com> Date: Fri, 10 Jul 2020 09:48:31 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/06/20 17:31, Christian Borntraeger wrote: > > I have trouble seeing value in this particular patch. We add LOCs > without providing any noticable benefit. All other patches in this series at > least reduce the amount of code. So I would defer this to Paolo if he prefers > to have this way across all architectures. Yes, it adds lines of code but they're just + struct kvm_run *kvm_run = vcpu->run; You could avoid the LoC increase by repeating vcpu->run over and over, but I think the code overall is clearer. Paolo