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Wed, 22 Apr 2020 16:04:19 +0000 (UTC) Received: from gondolin (ovpn-112-195.ams2.redhat.com [10.36.112.195]) by smtp.corp.redhat.com (Postfix) with ESMTP id DE51B19C70; Wed, 22 Apr 2020 16:04:05 +0000 (UTC) Date: Wed, 22 Apr 2020 18:04:03 +0200 From: Cornelia Huck To: Christian Borntraeger Subject: Re: [PATCH v2 1/7] KVM: s390: clean up redundant 'kvm_run' parameters Message-ID: <20200422180403.03f60b0c.cohuck@redhat.com> In-Reply-To: References: <20200422125810.34847-1-tianjia.zhang@linux.alibaba.com> <20200422125810.34847-2-tianjia.zhang@linux.alibaba.com> <20200422154543.2efba3dd.cohuck@redhat.com> Organization: Red Hat GmbH MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Cc: wanpengli@tencent.com, kvm@vger.kernel.org, david@redhat.com, benh@kernel.crashing.org, heiko.carstens@de.ibm.com, linux-mips@vger.kernel.org, paulus@ozlabs.org, hpa@zytor.com, kvmarm@lists.cs.columbia.edu, linux-s390@vger.kernel.org, frankja@linux.ibm.com, maz@kernel.org, joro@8bytes.org, x86@kernel.org, mingo@redhat.com, thuth@redhat.com, gor@linux.ibm.com, kvm-ppc@vger.kernel.org, bp@alien8.de, tglx@linutronix.de, linux-arm-kernel@lists.infradead.org, jmattson@google.com, tsbogend@alpha.franken.de, Tianjia Zhang , sean.j.christopherson@intel.com, linux-kernel@vger.kernel.org, mpe@ellerman.id.au, pbonzini@redhat.com, vkuznets@redhat.com, linuxppc-dev@lists.ozlabs.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On Wed, 22 Apr 2020 17:58:04 +0200 Christian Borntraeger wrote: > On 22.04.20 15:45, Cornelia Huck wrote: > > On Wed, 22 Apr 2020 20:58:04 +0800 > > Tianjia Zhang wrote: > > > >> In the current kvm version, 'kvm_run' has been included in the 'kvm_vcpu' > >> structure. Earlier than historical reasons, many kvm-related function > > > > s/Earlier than/For/ ? > > > >> parameters retain the 'kvm_run' and 'kvm_vcpu' parameters at the same time. > >> This patch does a unified cleanup of these remaining redundant parameters. > >> > >> Signed-off-by: Tianjia Zhang > >> --- > >> arch/s390/kvm/kvm-s390.c | 37 ++++++++++++++++++++++--------------- > >> 1 file changed, 22 insertions(+), 15 deletions(-) > >> > >> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c > >> index e335a7e5ead7..d7bb2e7a07ff 100644 > >> --- a/arch/s390/kvm/kvm-s390.c > >> +++ b/arch/s390/kvm/kvm-s390.c > >> @@ -4176,8 +4176,9 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) > >> return rc; > >> } > >> > >> -static void sync_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) > >> +static void sync_regs_fmt2(struct kvm_vcpu *vcpu) > >> { > >> + struct kvm_run *kvm_run = vcpu->run; > >> struct runtime_instr_cb *riccb; > >> struct gs_cb *gscb; > >> > >> @@ -4235,7 +4236,7 @@ static void sync_regs_fmt2(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) > >> } > >> if (vcpu->arch.gs_enabled) { > >> current->thread.gs_cb = (struct gs_cb *) > >> - &vcpu->run->s.regs.gscb; > >> + &kvm_run->s.regs.gscb; > > > > Not sure if these changes (vcpu->run-> => kvm_run->) are really worth > > it. (It seems they amount to at least as much as the changes advertised > > in the patch description.) > > > > Other opinions? > > Agreed. It feels kind of random. Maybe just do the first line (move kvm_run from the > function parameter list into the variable declaration)? Not sure if this is better. > There's more in this patch that I cut... but I think just moving kvm_run from the parameter list would be much less disruptive. _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm