From patchwork Wed Nov 23 12:25:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 628797 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CBD96C4332F for ; Wed, 23 Nov 2022 12:27:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237515AbiKWM0v (ORCPT ); Wed, 23 Nov 2022 07:26:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237261AbiKWM0N (ORCPT ); Wed, 23 Nov 2022 07:26:13 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4A7060E80; Wed, 23 Nov 2022 04:25:48 -0800 (PST) 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 ams.source.kernel.org (Postfix) with ESMTPS id 70293B81ED5; Wed, 23 Nov 2022 12:25:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BC08C433C1; Wed, 23 Nov 2022 12:25:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669206346; bh=tHqhDUSHq3ffWG1I/YC/xRRgv1nq4BU3p+/TFfRUrdI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nlbf/HJ5AH2BWfISiYvG/00jphh/RUKSt5ONtb/pdzTFeGizpg2RTEily7My9H7ob WvrhsddCYIRwv9nfiqoowz5k7/8gXwGaoDaABvgezjRseQRCLwKynSHTeF55EPg+Qb 4H3+XeCM2vAoQegiYFEwPm1C6mUQIAUWxtDCHinw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , Jens Axboe , Alison Schofield , Vishal Verma , Ira Weiny , Ben Widawsky , Dan Williams , Jeremy Kerr , Joel Stanley , Alistar Popple , Eddie James , Alexander Shishkin , Jonathan Cameron , Jilin Yuan , Heikki Krogerus , Alan Stern , Andy Shevchenko , Thomas Gleixner , Jason Gunthorpe , "Rafael J. Wysocki" , Won Chung , linux-block@vger.kernel.org, linux-cxl@vger.kernel.org, linux-fsi@lists.ozlabs.org, linux-usb@vger.kernel.org Subject: [PATCH 4/5] driver core: make struct device_type.devnode() take a const * Date: Wed, 23 Nov 2022 13:25:22 +0100 Message-Id: <20221123122523.1332370-4-gregkh@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123122523.1332370-1-gregkh@linuxfoundation.org> References: <20221123122523.1332370-1-gregkh@linuxfoundation.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=6608; i=gregkh@linuxfoundation.org; h=from:subject; bh=tHqhDUSHq3ffWG1I/YC/xRRgv1nq4BU3p+/TFfRUrdI=; b=owGbwMvMwCRo6H6F97bub03G02pJDMl1gsbbT9YcnTg9RC9we/NPp6iHinx80a+SXgmYcCnGfJU4 ym3YEcvCIMjEICumyPJlG8/R/RWHFL0MbU/DzGFlAhnCwMUpABM5/YZhNusK8/WT3h1etavvyWsNsU 93zCxlHBgWTOjQ4RX9lzDlgfXOlxNa3d7KFGd0AAA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The devnode() callback in struct device_type should not be modifying the device that is passed into it, so mark it as a const * and propagate the function signature changes out into all relevant subsystems that use this callback. Cc: Jens Axboe Cc: Alison Schofield Cc: Vishal Verma Cc: Ira Weiny Cc: Ben Widawsky Cc: Dan Williams Cc: Jeremy Kerr Cc: Joel Stanley Cc: Alistar Popple Cc: Eddie James Cc: Alexander Shishkin Cc: Jonathan Cameron Cc: Jilin Yuan Cc: Heikki Krogerus Cc: Alan Stern Cc: Andy Shevchenko Cc: Thomas Gleixner Cc: Jason Gunthorpe Cc: "Rafael J. Wysocki" Cc: Won Chung Cc: linux-block@vger.kernel.org Cc: linux-cxl@vger.kernel.org Cc: linux-fsi@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: linux-usb@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- block/genhd.c | 4 ++-- drivers/cxl/core/memdev.c | 2 +- drivers/fsi/fsi-core.c | 6 +++--- drivers/hwtracing/intel_th/core.c | 6 +++--- drivers/hwtracing/intel_th/intel_th.h | 4 ++-- drivers/usb/core/usb.c | 4 ++-- include/linux/device.h | 2 +- 7 files changed, 14 insertions(+), 14 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index 3f1124713442..391b52655b97 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1193,10 +1193,10 @@ struct class block_class = { .dev_uevent = block_uevent, }; -static char *block_devnode(struct device *dev, umode_t *mode, +static char *block_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { - struct gendisk *disk = dev_to_disk(dev); + const struct gendisk *disk = dev_to_disk(dev); if (disk->fops->devnode) return disk->fops->devnode(disk, mode); diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c index 20ce488a7754..6ae8d0bdc61b 100644 --- a/drivers/cxl/core/memdev.c +++ b/drivers/cxl/core/memdev.c @@ -27,7 +27,7 @@ static void cxl_memdev_release(struct device *dev) kfree(cxlmd); } -static char *cxl_memdev_devnode(struct device *dev, umode_t *mode, kuid_t *uid, +static char *cxl_memdev_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { return kasprintf(GFP_KERNEL, "cxl/%s", dev_name(dev)); diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c index 694e80c06665..0b927c9f4267 100644 --- a/drivers/fsi/fsi-core.c +++ b/drivers/fsi/fsi-core.c @@ -897,10 +897,10 @@ static const struct attribute_group *cfam_attr_groups[] = { NULL, }; -static char *cfam_devnode(struct device *dev, umode_t *mode, +static char *cfam_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { - struct fsi_slave *slave = to_fsi_slave(dev); + const struct fsi_slave *slave = to_fsi_slave(dev); #ifdef CONFIG_FSI_NEW_DEV_NODE return kasprintf(GFP_KERNEL, "fsi/cfam%d", slave->cdev_idx); @@ -915,7 +915,7 @@ static const struct device_type cfam_type = { .groups = cfam_attr_groups }; -static char *fsi_cdev_devnode(struct device *dev, umode_t *mode, +static char *fsi_cdev_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { #ifdef CONFIG_FSI_NEW_DEV_NODE diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index 7e753a75d23b..cc7f879bb175 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -185,11 +185,11 @@ static struct device_type intel_th_source_device_type = { .release = intel_th_device_release, }; -static char *intel_th_output_devnode(struct device *dev, umode_t *mode, +static char *intel_th_output_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { - struct intel_th_device *thdev = to_intel_th_device(dev); - struct intel_th *th = to_intel_th(thdev); + const struct intel_th_device *thdev = to_intel_th_device(dev); + const struct intel_th *th = to_intel_th(thdev); char *node; if (thdev->id >= 0) diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h index 0ffb42990175..6cbba733f259 100644 --- a/drivers/hwtracing/intel_th/intel_th.h +++ b/drivers/hwtracing/intel_th/intel_th.h @@ -205,7 +205,7 @@ struct intel_th_driver { * INTEL_TH_SWITCH and INTEL_TH_SOURCE are children of the intel_th device. */ static inline struct intel_th_device * -to_intel_th_parent(struct intel_th_device *thdev) +to_intel_th_parent(const struct intel_th_device *thdev) { struct device *parent = thdev->dev.parent; @@ -215,7 +215,7 @@ to_intel_th_parent(struct intel_th_device *thdev) return to_intel_th_device(parent); } -static inline struct intel_th *to_intel_th(struct intel_th_device *thdev) +static inline struct intel_th *to_intel_th(const struct intel_th_device *thdev) { if (thdev->type == INTEL_TH_OUTPUT) thdev = to_intel_th_parent(thdev); diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 8527c06b65e6..4df26f4f76e6 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -505,10 +505,10 @@ static const struct dev_pm_ops usb_device_pm_ops = { #endif /* CONFIG_PM */ -static char *usb_devnode(struct device *dev, +static char *usb_devnode(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid) { - struct usb_device *usb_dev; + const struct usb_device *usb_dev; usb_dev = to_usb_device(dev); return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d", diff --git a/include/linux/device.h b/include/linux/device.h index 46093bae6905..4ad1280713e6 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -89,7 +89,7 @@ struct device_type { const char *name; const struct attribute_group **groups; int (*uevent)(const struct device *dev, struct kobj_uevent_env *env); - char *(*devnode)(struct device *dev, umode_t *mode, + char *(*devnode)(const struct device *dev, umode_t *mode, kuid_t *uid, kgid_t *gid); void (*release)(struct device *dev);