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: 12020495 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=-14.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,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 C094CC433DB for ; Thu, 14 Jan 2021 18:03:06 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 8884923A34 for ; Thu, 14 Jan 2021 18:03:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8884923A34 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=gkBvLjGcE2MA6aeILF3n43Ycie7ULcRE0XFnq9vLaKA=; b=VFbf25u2v9rMWsKHOZVQqqDNa bVMQ/1pV2Omcp3Hfg+KyGMo0b+2WQi38LRlQH309eL/oSl1QJe849Srv7DbUz/N9oY8nthhHUUzJO JZyJO1sX4EeemFEtkMnmsNhrD1LG4Ni3AtLnbgQDWwGHanlt2QyBheOqzz00I7wHTvirvVA2W3z7I jpojFSIIftveFq6edP4Ymt1wZk0WuWw62WxKvq8jmwLka8+CUYEQTKVIAAM8N9MtwnoJNdTOKrC/U 9FDpzQpCQPGIpht58pOv/4s8QSIPGebVkOtIvYoazvYMfqKdxgSkWn/Dw8qWxkTkBgNGbT4lQtxD5 bZ4t0Ml/Q==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l06wR-0007J1-4b; Thu, 14 Jan 2021 18:01:51 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l06vi-00073R-Jy for linux-arm-kernel@lists.infradead.org; Thu, 14 Jan 2021 18:01:22 +0000 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 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210114_130107_698410_A286833D X-CRM114-Status: GOOD ( 11.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kernel-team@android.com, Jan Kara , Minchan Kim , Catalin Marinas , Linus Torvalds , Hugh Dickins , linux-mm@kvack.org, Vinayak Menon , "Kirill A . Shutemov" , Andrew Morton , Will Deacon , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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