From patchwork Thu Jan 14 17:59:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 12020481 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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D01EDC433E0 for ; Thu, 14 Jan 2021 18:01:12 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8868123B55 for ; Thu, 14 Jan 2021 18:01:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8868123B55 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2B59E8D00FF; Thu, 14 Jan 2021 13:01:08 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2646B8D00F0; Thu, 14 Jan 2021 13:01:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 158328D00FF; Thu, 14 Jan 2021 13:01:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0167.hostedemail.com [216.40.44.167]) by kanga.kvack.org (Postfix) with ESMTP id F02DB8D00F0 for ; Thu, 14 Jan 2021 13:01:07 -0500 (EST) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id B1788181AEF15 for ; Thu, 14 Jan 2021 18:01:07 +0000 (UTC) X-FDA: 77705146974.05.sky08_281824227528 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin05.hostedemail.com (Postfix) with ESMTP id 6538618179021 for ; Thu, 14 Jan 2021 18:01:07 +0000 (UTC) X-HE-Tag: sky08_281824227528 X-Filterd-Recvd-Size: 2589 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf06.hostedemail.com (Postfix) with ESMTP for ; Thu, 14 Jan 2021 18:01:06 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id AD6BF23A34; Thu, 14 Jan 2021 18:01:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610647265; bh=le/X67LqDQyYNfmvnh3xPk1qP9pMyMRhNXSbQy6H+SM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pWzH1j8Vdej/zy9+re0IxtOLZ1Npy8Kaf+fx/fK0SsPPlM+NzZBl+g9RnCPNS1n3s CxWm8Qg75WMAtEulY47zE2T3jvidDyc03HYzFttAsAVhg5rWSyJjWCqMeANJdMwZQQ sVjZzsBBnieVyMenHT/j4I5+Pw6Zan2KSffZiCkpksNqyeU5PnApJgFHaNMVeaMgCW heOkRBlQMIbYBNG62v+XLydCFfGUuZmAJSZLxzGcIhKF6kUqCN5jyE9n65JLK2Wv1D wrRGEZtjuOc2jyX6r6ThbnZhFPlFJ6rsclSUjF0z9hyEzpMPmVk/C082wEsQhmUyV5 plWaxStDUW91A== From: Will Deacon To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, Will Deacon , Catalin Marinas , Jan Kara , Minchan Kim , Andrew Morton , "Kirill A . Shutemov" , Linus Torvalds , Vinayak Menon , Hugh Dickins , kernel-team@android.com Subject: [RFC PATCH 8/8] mm: Mark 'info' field of 'struct vm_fault' as 'const' Date: Thu, 14 Jan 2021 17:59:34 +0000 Message-Id: <20210114175934.13070-9-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210114175934.13070-1-will@kernel.org> References: <20210114175934.13070-1-will@kernel.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The field is only ever read after being initialised, so mark it 'const' before somebody tries to modify it again. Cc: Kirill A. Shutemov Cc: Linus Torvalds Signed-off-by: Will Deacon --- include/linux/mm.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index c24dd17b32c5..b45a8e075f7f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -521,7 +521,7 @@ struct vm_fault_info { }; struct vm_fault { - struct vm_fault_info info; + const struct vm_fault_info info; unsigned int flags; /* FAULT_FLAG_xxx flags * XXX: should be in vm_fault_info */ pmd_t *pmd; /* Pointer to pmd entry matching