From patchwork Mon Mar 13 18:29:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 69051 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp1354437wrd; Mon, 13 Mar 2023 12:04:17 -0700 (PDT) X-Google-Smtp-Source: AK7set+7Cxb8TXDLtbwQprEMhDE/GH9LRAlX1qaIeX9enyld7j8x/lyJ6l+6fpSfy5yKyIydOGAY X-Received: by 2002:aa7:9529:0:b0:623:8592:75c4 with SMTP id c9-20020aa79529000000b00623859275c4mr4584815pfp.29.1678734257582; Mon, 13 Mar 2023 12:04:17 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1678734257; cv=none; d=google.com; s=arc-20160816; b=s8MyIclnHlbRHaFnwO6ilAsbseXP52pE5xsbXq4wSbj1t0EB+ZJbWjYIO9gS5VVy2D YQX/utr7pKGIvtn7R9aKx9fuAeYuyS+UCIRVzcYJMn/VClTKBraH0ybaFReWqOrNg+Ri v2tzR9kUuEE5efOVTE0t9YdxF13wfIcpQixU449ZUwhy6LVlxEAU8uFjjIYfHSvNOG2E 8leeAPOgTQAUUEdJ+rZdLGQjigeFIQAP5HMqur0704xQpCgOglU7F5r91gz1GJmy+BnI XnElR2rrD4Arz6cErO9+2M010LUrbzPzvjlqW1Wc2UMi6xSp+4Ybban6UgcoTGo9+JEa Nm2A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=CEhapoBdU9PSxbAFYfqYaUsysVlsakvzO4ueoFhj5RE=; b=BvzuFoYqxUc6hxOxEt0jxiajQFyrTU/PoBiooK8FfL03Oj1vJwG/fwiEhzNMX+6M9o rA7ilrknrgcG5Be3/P+PGqNtOzuvwvTOIxV4p9JmpnHOQdRFchNPjeu8Jc885QOMZ3nH wi3B42hg1C0D27ji9MQjFoMx2/nLT+z4T2SStoQddxiY+mhrL7jJM+vquGsMIPuDAPdy hARtxFZcLe+7RrtS5spY+Th5nZ+U1Eac2D11PjorhWpqXTs3Y38N169eRAkBcNXpjd2s 5bMTJEiVnqPnj6HDp2L2pO/hgzcW7zL0iVjIeZbdrC7aIA0QRC3QzZ8UDQRuLhfeCltO XMCw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=wifLC8Sv; 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=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id f10-20020a6547ca000000b005090185ad64si138908pgs.879.2023.03.13.12.04.04; Mon, 13 Mar 2023 12:04:17 -0700 (PDT) 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=@linuxfoundation.org header.s=korg header.b=wifLC8Sv; 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=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231435AbjCMScj (ORCPT + 99 others); Mon, 13 Mar 2023 14:32:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231139AbjCMScB (ORCPT ); Mon, 13 Mar 2023 14:32:01 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A24884F6C for ; Mon, 13 Mar 2023 11:31:09 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 8511F61465 for ; Mon, 13 Mar 2023 18:30:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95DEAC433D2; Mon, 13 Mar 2023 18:30:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678732248; bh=XOt986J4P1SQsjKxI3G691EIKx8QyqtjbVGtFAmvj24=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wifLC8SvUOVTXRkE2sazX5gOlQwZKubUUINw5E59fDDwyHo6YWaKKTDr+o/iQ0Yv+ y5Ky/4JEL7u4QSKsf1uaC1ABb9A3ud6QeLQU7OmK8kHI4kriupcyR9zNqmxluCpY5H tL3cY2TnPPuNqkMXdAVAtjwcrEay3o+R/7MolWOE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: rafael@kernel.org, Greg Kroah-Hartman Subject: [PATCH 28/36] driver core: make the bus_type in struct device_driver constant Date: Mon, 13 Mar 2023 19:29:10 +0100 Message-Id: <20230313182918.1312597-28-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230313182918.1312597-1-gregkh@linuxfoundation.org> References: <20230313182918.1312597-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=955; i=gregkh@linuxfoundation.org; h=from:subject; bh=XOt986J4P1SQsjKxI3G691EIKx8QyqtjbVGtFAmvj24=; b=owGbwMvMwCRo6H6F97bub03G02pJDCn82dVsb5yWXN3845t6n23hxESxrAv+2Y6Vqm+T523e2 HX1hHFIRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAExE/DvDgoOa7Jr/3y7ssZdz dlqwv2DDHiWh2wwLNpipTHS8q85SmFS26oG8uac8t0gKAA== X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS 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?1760280452507210402?= X-GMAIL-MSGID: =?utf-8?q?1760280452507210402?= The pointer to struct bus_type in struct device_driver should only be pointing to something that can never change now that the driver core has fixed up the previously writable fields. So mark it as a constant pointer to enforce this and move forward with the goal of moving bus_type into read-only memory. Cc: "Rafael J. Wysocki" Signed-off-by: Greg Kroah-Hartman --- include/linux/device/driver.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h index ceb0e477c2c8..0f22a6f46f8c 100644 --- a/include/linux/device/driver.h +++ b/include/linux/device/driver.h @@ -95,7 +95,7 @@ enum probe_type { */ struct device_driver { const char *name; - struct bus_type *bus; + const struct bus_type *bus; struct module *owner; const char *mod_name; /* used for built-in modules */