From patchwork Fri Dec 8 13:20:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Biju Das X-Patchwork-Id: 13485410 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 aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0307AC10DCE for ; Fri, 8 Dec 2023 13:21:04 +0000 (UTC) Received: from relmlie6.idc.renesas.com (relmlie6.idc.renesas.com [210.160.252.172]) by mx.groups.io with SMTP id smtpd.web10.35277.1702041653355936297 for ; Fri, 08 Dec 2023 05:21:02 -0800 Authentication-Results: mx.groups.io; dkim=none (message not signed); spf=pass (domain: bp.renesas.com, ip: 210.160.252.172, mailfrom: biju.das.jz@bp.renesas.com) X-IronPort-AV: E=Sophos;i="6.04,260,1695654000"; d="scan'208";a="189673993" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 08 Dec 2023 22:21:01 +0900 Received: from localhost.localdomain (unknown [10.226.92.254]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id E1E05400297E; Fri, 8 Dec 2023 22:20:59 +0900 (JST) From: Biju Das To: cip-dev@lists.cip-project.org, Nobuhiro Iwamatsu , Pavel Machek Cc: Biju Das , Lad Prabhakar Subject: [PATCH 5.10.y-cip v2 23/25] drm: [HACK DO NOT APPLY] Allow const struct drm_driver Date: Fri, 8 Dec 2023 13:20:05 +0000 Message-Id: <20231208132007.108762-24-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231208132007.108762-1-biju.das.jz@bp.renesas.com> References: <20231208132007.108762-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Fri, 08 Dec 2023 13:21:04 -0000 X-Groupsio-URL: https://lists.cip-project.org/g/cip-dev/message/13966 From: Daniel Vetter commit 8f5c7aa078cf6f81ef5afc3f0516b4049decb4eb upstream. It's nice if a big function/ioctl table like this is const. Only downside here is that we need a few more #ifdef to paper over the differences when CONFIG_DRM_LEGACY is enabled. Maybe provides more motivation to sunset that horror show :-) v2: - Fix super important checkpatch warning (Sam) - Update the kerneldoc example too (Sam) Acked-by: Maxime Ripard Reviewed-by: Sam Ravnborg Acked-by: Thomas Zimmermann Reviewed-by: Alex Deucher Signed-off-by: Daniel Vetter Cc: Sam Ravnborg Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201104100425.1922351-4-daniel.vetter@ffwll.ch Signed-off-by: Biju Das --- drivers/gpu/drm/drm_drv.c | 17 +++++++++++------ include/drm/drm_device.h | 4 ++++ include/drm/drm_drv.h | 5 +++-- 3 files changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 4ca995ce19af..b0cd67cedf47 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -284,7 +284,7 @@ void drm_minor_release(struct drm_minor *minor) * struct clk *pclk; * }; * - * static struct drm_driver driver_drm_driver = { + * static const struct drm_driver driver_drm_driver = { * [...] * }; * @@ -574,7 +574,7 @@ static void drm_dev_init_release(struct drm_device *dev, void *res) } static int drm_dev_init(struct drm_device *dev, - struct drm_driver *driver, + const struct drm_driver *driver, struct device *parent) { struct inode *inode; @@ -590,7 +590,11 @@ static int drm_dev_init(struct drm_device *dev, kref_init(&dev->ref); dev->dev = get_device(parent); +#ifdef CONFIG_DRM_LEGACY + dev->driver = (struct drm_driver *)driver; +#else dev->driver = driver; +#endif INIT_LIST_HEAD(&dev->managed.resources); spin_lock_init(&dev->managed.lock); @@ -666,7 +670,7 @@ static void devm_drm_dev_init_release(void *data) static int devm_drm_dev_init(struct device *parent, struct drm_device *dev, - struct drm_driver *driver) + const struct drm_driver *driver) { int ret; @@ -681,7 +685,8 @@ static int devm_drm_dev_init(struct device *parent, return ret; } -void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, +void *__devm_drm_dev_alloc(struct device *parent, + const struct drm_driver *driver, size_t size, size_t offset) { void *container; @@ -716,7 +721,7 @@ EXPORT_SYMBOL(__devm_drm_dev_alloc); * RETURNS: * Pointer to new DRM device, or ERR_PTR on failure. */ -struct drm_device *drm_dev_alloc(struct drm_driver *driver, +struct drm_device *drm_dev_alloc(const struct drm_driver *driver, struct device *parent) { struct drm_device *dev; @@ -861,7 +866,7 @@ static void remove_compat_control_link(struct drm_device *dev) */ int drm_dev_register(struct drm_device *dev, unsigned long flags) { - struct drm_driver *driver = dev->driver; + const struct drm_driver *driver = dev->driver; int ret; if (!driver->load) diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h index f4f68e7a9149..2c361964aee7 100644 --- a/include/drm/drm_device.h +++ b/include/drm/drm_device.h @@ -83,7 +83,11 @@ struct drm_device { } managed; /** @driver: DRM driver managing the device */ +#ifdef CONFIG_DRM_LEGACY struct drm_driver *driver; +#else + const struct drm_driver *driver; +#endif /** * @dev_private: diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index e57d0440f00f..8324b65b4dae 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -588,7 +588,8 @@ struct drm_driver { int dev_priv_size; }; -void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, +void *__devm_drm_dev_alloc(struct device *parent, + const struct drm_driver *driver, size_t size, size_t offset); /** @@ -621,7 +622,7 @@ void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver, ((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \ offsetof(type, member))) -struct drm_device *drm_dev_alloc(struct drm_driver *driver, +struct drm_device *drm_dev_alloc(const struct drm_driver *driver, struct device *parent); int drm_dev_register(struct drm_device *dev, unsigned long flags); void drm_dev_unregister(struct drm_device *dev);