From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70B6FC5518B for ; Wed, 22 Apr 2020 15:58:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 50F9020767 for ; Wed, 22 Apr 2020 15:58:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726577AbgDVP6W (ORCPT ); Wed, 22 Apr 2020 11:58:22 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:21286 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726124AbgDVP6V (ORCPT ); Wed, 22 Apr 2020 11:58:21 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 03MFrdQ6065748 for ; Wed, 22 Apr 2020 11:58:19 -0400 Received: from e06smtp05.uk.ibm.com (e06smtp05.uk.ibm.com [195.75.94.101]) by mx0b-001b2d01.pphosted.com with ESMTP id 30jry5850p-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 22 Apr 2020 11:58:19 -0400 Received: from localhost by e06smtp05.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 22 Apr 2020 16:57:14 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 03MFw6tH66781382 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 22 Apr 2020 15:58:06 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2E6764C044; Wed, 22 Apr 2020 15:58:06 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 796EE4C059; Wed, 22 Apr 2020 15:58:04 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.66.78]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 22 Apr 2020 15:58:04 +0000 (GMT) Subject: Re: [PATCH v2 1/7] KVM: s390: clean up redundant 'kvm_run' parameters To: Cornelia Huck , Tianjia Zhang Cc: pbonzini@redhat.com, tsbogend@alpha.franken.de, paulus@ozlabs.org, mpe@ellerman.id.au, benh@kernel.crashing.org, frankja@linux.ibm.com, david@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, 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: <20200422125810.34847-1-tianjia.zhang@linux.alibaba.com> <20200422125810.34847-2-tianjia.zhang@linux.alibaba.com> <20200422154543.2efba3dd.cohuck@redhat.com> From: Christian Borntraeger Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20200422154543.2efba3dd.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20042215-0020-0000-0000-000003CC9FF8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20042215-0021-0000-0000-000022259CDB Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-22_06:2020-04-22,2020-04-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 priorityscore=1501 spamscore=0 suspectscore=0 phishscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004220117 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.