From patchwork Thu Jan 26 19:37:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suren Baghdasaryan X-Patchwork-Id: 48865 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp451994wrn; Thu, 26 Jan 2023 11:41:06 -0800 (PST) X-Google-Smtp-Source: AMrXdXvKYEyvO+f0aad2VMtMF4qtw8eZZ39L+04GyQJ4Hv0A6JMqTzESWLWqynINXs7vrNIpdRbn X-Received: by 2002:a17:902:aa05:b0:193:335a:989e with SMTP id be5-20020a170902aa0500b00193335a989emr36762907plb.25.1674762066451; Thu, 26 Jan 2023 11:41:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1674762066; cv=none; d=google.com; s=arc-20160816; b=ucHkJrfwk4vd2HPOVJRFQ5ME95BSAWZ385GwoePEhmylwmaj/gEiz2ZuRRdPkFenGF Mzg6CBLPRV2pPvCCHqw3idbThAExIVePV9+Kyyo0E79mLJNe7vxqCX/1Z2Nxl/THPdUb rPyHbN42JL53Irm3C6x4i3QTHmYRsWhP3hU8BA/ZLyxblPQWWgRvm+JF6lNDRfMrQa9n 77Qn453yDnlsBhzW0dPQGmyCxFk6ZrXxE/mFhSu65skN1+kcGJtU0CQHAmBFd6ZX7Wfb FKZQLMXk1rCsHVDSH07K+X2nJ41LO89QMQmIkQO4CBu9CBwQpGtP7FzvN87Tk0H/BtPj NOAg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:dkim-signature; bh=aLjaaxPJUorXnCMktZtzjKFOG8Xxelv9KGA9flqeCpQ=; b=LXWujFRb432DfsWIYx6MYRyogh8ZtcOidAGYKcIdTsOGvF2oor28tJC9vRnW6zlrDe Y5tfS76s5x1NQSDOWaJFo/fGsKk7bu8552oEC98Vhr6c9BlAdNd7fjmlxOFtoCHIftI7 0R0qGE7CBszOk6cJ1f4pqgXaQIlL3EbQHRpuBYT9UrqBP9J6HCMWhlaQCHD9vojtsU+z AtEXQwQllqZjfqToXt1neS5KkMLXbB7W3SFxYvYc2E3t2TIknm3AfaEgdyXJrihs8phZ 2u416zWhceVY7Yynn1SfnFpzybpFep8D9iyIbxokIE6jDL4rK1ROa4ig+l2/rSww1b6k AFrw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=fpC9OxtB; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id x21-20020a17090300d500b001933171a4eesi2222735plc.113.2023.01.26.11.40.54; Thu, 26 Jan 2023 11:41:06 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=fpC9OxtB; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232313AbjAZTiI (ORCPT + 99 others); Thu, 26 Jan 2023 14:38:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232435AbjAZTiC (ORCPT ); Thu, 26 Jan 2023 14:38:02 -0500 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE15022023 for ; Thu, 26 Jan 2023 11:37:59 -0800 (PST) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5063c0b909eso31120437b3.7 for ; Thu, 26 Jan 2023 11:37:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=aLjaaxPJUorXnCMktZtzjKFOG8Xxelv9KGA9flqeCpQ=; b=fpC9OxtByMrsgeuCLlTqjq7ljheyeUGFByxdovFvi/BEZbaqTBtYfqbw7mV85n35vh nsJw1tLg82ZBRg3RV9Utdbg2g8s0Gs6HglMnvLMVN1RCTr4mkBoD2v2oZh4Mjh9w/Usr DL7mn5GFR4iC1hBs+0CvTUhQnmsv06W09b6suBaVdlve2NmFj/hGVpWM4xqWu44vFGv+ cln+RN7Rzpw5J9WfB/zYjO6KEwxRe8QhOmkLvUNBVLba9roo72RSbcTHiolp9Ji6xuqA dACq72jx3kgKLuzmXwAspaoItebJfeBLbx4oDjP1Exnk9IXVYclbAW1J4WBLbHjzpPE8 Y+sw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=aLjaaxPJUorXnCMktZtzjKFOG8Xxelv9KGA9flqeCpQ=; b=IzHGNDpwq+W0/HRteh1t+xXB/aVSgeBGFk/p1jnkTiZr1e9CVMqTAgHYpJbWsOIQQx mIFPj2WTYPvM20MR85jEU2nM0IsFz0Wp6ojA+nThbTzjiz/UpQH1C8nlaiIzk6gMyC5D eYfNOpBT5gh9t58y6D1vPFbrGO3Ma+QIsJCxCifgKnSccupvsNctAyW9s+JT+E05yHQU E2AMIhelJfW9GoSr2rCZfs1HakP5CSNNsu/3S70a/dChgtJF4aZ5GHyjLwTVVV0rSdT9 V+NN53czq77aowmtEjFT99MHix8Jcskc3KxJkRwOqbXWXpdrKVGZxbShhYqs45Fk7NbT COBQ== X-Gm-Message-State: AFqh2konMrYlNPYXUSSnqgrVJ2eBYMYMAZtWhsedETiBJGXjPmX7it8z /6eZuOCp3RzVmuYvkD/ubu8zmYkgDo0= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:200:d774:88af:bab3:648d]) (user=surenb job=sendgmr) by 2002:a0d:da83:0:b0:3c3:8b8e:13ee with SMTP id c125-20020a0dda83000000b003c38b8e13eemr4101612ywe.77.1674761878986; Thu, 26 Jan 2023 11:37:58 -0800 (PST) Date: Thu, 26 Jan 2023 11:37:46 -0800 In-Reply-To: <20230126193752.297968-1-surenb@google.com> Mime-Version: 1.0 References: <20230126193752.297968-1-surenb@google.com> X-Mailer: git-send-email 2.39.1.456.gfc5497dd1b-goog Message-ID: <20230126193752.297968-2-surenb@google.com> Subject: [PATCH v4 1/7] kernel/fork: convert vma assignment to a memcpy From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: michel@lespinasse.org, jglisse@google.com, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, mgorman@techsingularity.net, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, peterz@infradead.org, ldufour@linux.ibm.com, paulmck@kernel.org, mingo@redhat.com, will@kernel.org, luto@kernel.org, songliubraving@fb.com, peterx@redhat.com, david@redhat.com, dhowells@redhat.com, hughd@google.com, bigeasy@linutronix.de, kent.overstreet@linux.dev, punit.agrawal@bytedance.com, lstoakes@gmail.com, peterjung1337@gmail.com, rientjes@google.com, axelrasmussen@google.com, joelaf@google.com, minchan@google.com, rppt@kernel.org, jannh@google.com, shakeelb@google.com, tatashin@google.com, edumazet@google.com, gthelen@google.com, gurua@google.com, arjunroy@google.com, soheil@google.com, leewalsh@google.com, posk@google.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-kernel@vger.kernel.org, kernel-team@android.com, surenb@google.com X-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1756115308623179830?= X-GMAIL-MSGID: =?utf-8?q?1756115308623179830?= Convert vma assignment in vm_area_dup() to a memcpy() to prevent compiler errors when we add a const modifier to vma->vm_flags. Signed-off-by: Suren Baghdasaryan Acked-by: Mel Gorman Acked-by: Mike Rapoport (IBM) --- kernel/fork.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/fork.c b/kernel/fork.c index 441dcec60aae..9260f975b8f4 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -472,7 +472,7 @@ struct vm_area_struct *vm_area_dup(struct vm_area_struct *orig) * orig->shared.rb may be modified concurrently, but the clone * will be reinitialized. */ - *new = data_race(*orig); + data_race(memcpy(new, orig, sizeof(*new))); INIT_LIST_HEAD(&new->anon_vma_chain); dup_anon_vma_name(orig, new); }