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From: Daniel Vetter <daniel@ffwll.ch>
To: Christoph Hellwig <hch@lst.de>
Cc: Frederic Barrat <fbarrat@linux.ibm.com>,
	Andrew Donnellan <ajd@linux.ibm.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Jessica Yu <jeyu@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Jiri Kosina <jikos@kernel.org>, Miroslav Benes <mbenes@suse.cz>,
	Petr Mladek <pmladek@suse.com>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	dri-devel@lists.freedesktop.org, live-patching@vger.kernel.org,
	linux-kbuild@vger.kernel.org
Subject: Re: [PATCH 02/13] drm: remove drm_fb_helper_modinit
Date: Wed, 3 Feb 2021 11:34:50 +0100	[thread overview]
Message-ID: <YBp8ShiKbQSPCcRx@phenom.ffwll.local> (raw)
In-Reply-To: <20210128181421.2279-3-hch@lst.de>

On Thu, Jan 28, 2021 at 07:14:10PM +0100, Christoph Hellwig wrote:
> drm_fb_helper_modinit has a lot of boilerplate for what is not very
> simple functionality.  Just open code it in the only caller using
> IS_ENABLED and IS_MODULE, and skip the find_module check as a
> request_module is harmless if the module is already loaded (and not
> other caller has this find_module check either).
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Hm I thought I've acked this one already somewhere for merging through
your tree.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
>  drivers/gpu/drm/drm_crtc_helper_internal.h | 10 ---------
>  drivers/gpu/drm/drm_fb_helper.c            | 21 ------------------
>  drivers/gpu/drm/drm_kms_helper_common.c    | 25 +++++++++++-----------
>  3 files changed, 12 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
> index 25ce42e799952c..61e09f8a8d0ff0 100644
> --- a/drivers/gpu/drm/drm_crtc_helper_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
> @@ -32,16 +32,6 @@
>  #include <drm/drm_encoder.h>
>  #include <drm/drm_modes.h>
>  
> -/* drm_fb_helper.c */
> -#ifdef CONFIG_DRM_FBDEV_EMULATION
> -int drm_fb_helper_modinit(void);
> -#else
> -static inline int drm_fb_helper_modinit(void)
> -{
> -	return 0;
> -}
> -#endif
> -
>  /* drm_dp_aux_dev.c */
>  #ifdef CONFIG_DRM_DP_AUX_CHARDEV
>  int drm_dp_aux_dev_init(void);
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 4b81195106875d..0b9f1ae1b7864c 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2499,24 +2499,3 @@ void drm_fbdev_generic_setup(struct drm_device *dev,
>  	drm_client_register(&fb_helper->client);
>  }
>  EXPORT_SYMBOL(drm_fbdev_generic_setup);
> -
> -/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> - * but the module doesn't depend on any fb console symbols.  At least
> - * attempt to load fbcon to avoid leaving the system without a usable console.
> - */
> -int __init drm_fb_helper_modinit(void)
> -{
> -#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
> -	const char name[] = "fbcon";
> -	struct module *fbcon;
> -
> -	mutex_lock(&module_mutex);
> -	fbcon = find_module(name);
> -	mutex_unlock(&module_mutex);
> -
> -	if (!fbcon)
> -		request_module_nowait(name);
> -#endif
> -	return 0;
> -}
> -EXPORT_SYMBOL(drm_fb_helper_modinit);
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index 221a8528c9937a..f933da1656eb52 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -64,19 +64,18 @@ MODULE_PARM_DESC(edid_firmware,
>  
>  static int __init drm_kms_helper_init(void)
>  {
> -	int ret;
> -
> -	/* Call init functions from specific kms helpers here */
> -	ret = drm_fb_helper_modinit();
> -	if (ret < 0)
> -		goto out;
> -
> -	ret = drm_dp_aux_dev_init();
> -	if (ret < 0)
> -		goto out;
> -
> -out:
> -	return ret;
> +	/*
> +	 * The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> +	 * but the module doesn't depend on any fb console symbols.  At least
> +	 * attempt to load fbcon to avoid leaving the system without a usable
> +	 * console.
> +	 */
> +	if (IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION) &&
> +	    IS_MODULE(CONFIG_FRAMEBUFFER_CONSOLE) &&
> +	    !IS_ENABLED(CONFIG_EXPERT))
> +		request_module_nowait("fbcon");
> +
> +	return drm_dp_aux_dev_init();
>  }
>  
>  static void __exit drm_kms_helper_exit(void)
> -- 
> 2.29.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

WARNING: multiple messages have this Message-ID
From: Daniel Vetter <daniel@ffwll.ch>
To: Christoph Hellwig <hch@lst.de>
Cc: Petr Mladek <pmladek@suse.com>, Jiri Kosina <jikos@kernel.org>,
	Andrew Donnellan <ajd@linux.ibm.com>,
	linux-kbuild@vger.kernel.org, David Airlie <airlied@linux.ie>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
	live-patching@vger.kernel.org,
	Michal Marek <michal.lkml@markovi.net>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	dri-devel@lists.freedesktop.org,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Jessica Yu <jeyu@kernel.org>,
	Frederic Barrat <fbarrat@linux.ibm.com>,
	Daniel Vetter <daniel@ffwll.ch>, Miroslav Benes <mbenes@suse.cz>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 02/13] drm: remove drm_fb_helper_modinit
Date: Wed, 3 Feb 2021 11:34:50 +0100	[thread overview]
Message-ID: <YBp8ShiKbQSPCcRx@phenom.ffwll.local> (raw)
In-Reply-To: <20210128181421.2279-3-hch@lst.de>

On Thu, Jan 28, 2021 at 07:14:10PM +0100, Christoph Hellwig wrote:
> drm_fb_helper_modinit has a lot of boilerplate for what is not very
> simple functionality.  Just open code it in the only caller using
> IS_ENABLED and IS_MODULE, and skip the find_module check as a
> request_module is harmless if the module is already loaded (and not
> other caller has this find_module check either).
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Hm I thought I've acked this one already somewhere for merging through
your tree.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
>  drivers/gpu/drm/drm_crtc_helper_internal.h | 10 ---------
>  drivers/gpu/drm/drm_fb_helper.c            | 21 ------------------
>  drivers/gpu/drm/drm_kms_helper_common.c    | 25 +++++++++++-----------
>  3 files changed, 12 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
> index 25ce42e799952c..61e09f8a8d0ff0 100644
> --- a/drivers/gpu/drm/drm_crtc_helper_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
> @@ -32,16 +32,6 @@
>  #include <drm/drm_encoder.h>
>  #include <drm/drm_modes.h>
>  
> -/* drm_fb_helper.c */
> -#ifdef CONFIG_DRM_FBDEV_EMULATION
> -int drm_fb_helper_modinit(void);
> -#else
> -static inline int drm_fb_helper_modinit(void)
> -{
> -	return 0;
> -}
> -#endif
> -
>  /* drm_dp_aux_dev.c */
>  #ifdef CONFIG_DRM_DP_AUX_CHARDEV
>  int drm_dp_aux_dev_init(void);
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 4b81195106875d..0b9f1ae1b7864c 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2499,24 +2499,3 @@ void drm_fbdev_generic_setup(struct drm_device *dev,
>  	drm_client_register(&fb_helper->client);
>  }
>  EXPORT_SYMBOL(drm_fbdev_generic_setup);
> -
> -/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> - * but the module doesn't depend on any fb console symbols.  At least
> - * attempt to load fbcon to avoid leaving the system without a usable console.
> - */
> -int __init drm_fb_helper_modinit(void)
> -{
> -#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
> -	const char name[] = "fbcon";
> -	struct module *fbcon;
> -
> -	mutex_lock(&module_mutex);
> -	fbcon = find_module(name);
> -	mutex_unlock(&module_mutex);
> -
> -	if (!fbcon)
> -		request_module_nowait(name);
> -#endif
> -	return 0;
> -}
> -EXPORT_SYMBOL(drm_fb_helper_modinit);
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index 221a8528c9937a..f933da1656eb52 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -64,19 +64,18 @@ MODULE_PARM_DESC(edid_firmware,
>  
>  static int __init drm_kms_helper_init(void)
>  {
> -	int ret;
> -
> -	/* Call init functions from specific kms helpers here */
> -	ret = drm_fb_helper_modinit();
> -	if (ret < 0)
> -		goto out;
> -
> -	ret = drm_dp_aux_dev_init();
> -	if (ret < 0)
> -		goto out;
> -
> -out:
> -	return ret;
> +	/*
> +	 * The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> +	 * but the module doesn't depend on any fb console symbols.  At least
> +	 * attempt to load fbcon to avoid leaving the system without a usable
> +	 * console.
> +	 */
> +	if (IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION) &&
> +	    IS_MODULE(CONFIG_FRAMEBUFFER_CONSOLE) &&
> +	    !IS_ENABLED(CONFIG_EXPERT))
> +		request_module_nowait("fbcon");
> +
> +	return drm_dp_aux_dev_init();
>  }
>  
>  static void __exit drm_kms_helper_exit(void)
> -- 
> 2.29.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

WARNING: multiple messages have this Message-ID
From: Daniel Vetter <daniel@ffwll.ch>
To: Christoph Hellwig <hch@lst.de>
Cc: Petr Mladek <pmladek@suse.com>, Jiri Kosina <jikos@kernel.org>,
	Andrew Donnellan <ajd@linux.ibm.com>,
	linux-kbuild@vger.kernel.org, David Airlie <airlied@linux.ie>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	linux-kernel@vger.kernel.org, live-patching@vger.kernel.org,
	Michal Marek <michal.lkml@markovi.net>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	dri-devel@lists.freedesktop.org,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Jessica Yu <jeyu@kernel.org>,
	Frederic Barrat <fbarrat@linux.ibm.com>,
	Miroslav Benes <mbenes@suse.cz>,
	linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 02/13] drm: remove drm_fb_helper_modinit
Date: Wed, 3 Feb 2021 11:34:50 +0100	[thread overview]
Message-ID: <YBp8ShiKbQSPCcRx@phenom.ffwll.local> (raw)
In-Reply-To: <20210128181421.2279-3-hch@lst.de>

On Thu, Jan 28, 2021 at 07:14:10PM +0100, Christoph Hellwig wrote:
> drm_fb_helper_modinit has a lot of boilerplate for what is not very
> simple functionality.  Just open code it in the only caller using
> IS_ENABLED and IS_MODULE, and skip the find_module check as a
> request_module is harmless if the module is already loaded (and not
> other caller has this find_module check either).
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Hm I thought I've acked this one already somewhere for merging through
your tree.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

> ---
>  drivers/gpu/drm/drm_crtc_helper_internal.h | 10 ---------
>  drivers/gpu/drm/drm_fb_helper.c            | 21 ------------------
>  drivers/gpu/drm/drm_kms_helper_common.c    | 25 +++++++++++-----------
>  3 files changed, 12 insertions(+), 44 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
> index 25ce42e799952c..61e09f8a8d0ff0 100644
> --- a/drivers/gpu/drm/drm_crtc_helper_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
> @@ -32,16 +32,6 @@
>  #include <drm/drm_encoder.h>
>  #include <drm/drm_modes.h>
>  
> -/* drm_fb_helper.c */
> -#ifdef CONFIG_DRM_FBDEV_EMULATION
> -int drm_fb_helper_modinit(void);
> -#else
> -static inline int drm_fb_helper_modinit(void)
> -{
> -	return 0;
> -}
> -#endif
> -
>  /* drm_dp_aux_dev.c */
>  #ifdef CONFIG_DRM_DP_AUX_CHARDEV
>  int drm_dp_aux_dev_init(void);
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 4b81195106875d..0b9f1ae1b7864c 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2499,24 +2499,3 @@ void drm_fbdev_generic_setup(struct drm_device *dev,
>  	drm_client_register(&fb_helper->client);
>  }
>  EXPORT_SYMBOL(drm_fbdev_generic_setup);
> -
> -/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> - * but the module doesn't depend on any fb console symbols.  At least
> - * attempt to load fbcon to avoid leaving the system without a usable console.
> - */
> -int __init drm_fb_helper_modinit(void)
> -{
> -#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
> -	const char name[] = "fbcon";
> -	struct module *fbcon;
> -
> -	mutex_lock(&module_mutex);
> -	fbcon = find_module(name);
> -	mutex_unlock(&module_mutex);
> -
> -	if (!fbcon)
> -		request_module_nowait(name);
> -#endif
> -	return 0;
> -}
> -EXPORT_SYMBOL(drm_fb_helper_modinit);
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index 221a8528c9937a..f933da1656eb52 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -64,19 +64,18 @@ MODULE_PARM_DESC(edid_firmware,
>  
>  static int __init drm_kms_helper_init(void)
>  {
> -	int ret;
> -
> -	/* Call init functions from specific kms helpers here */
> -	ret = drm_fb_helper_modinit();
> -	if (ret < 0)
> -		goto out;
> -
> -	ret = drm_dp_aux_dev_init();
> -	if (ret < 0)
> -		goto out;
> -
> -out:
> -	return ret;
> +	/*
> +	 * The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
> +	 * but the module doesn't depend on any fb console symbols.  At least
> +	 * attempt to load fbcon to avoid leaving the system without a usable
> +	 * console.
> +	 */
> +	if (IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION) &&
> +	    IS_MODULE(CONFIG_FRAMEBUFFER_CONSOLE) &&
> +	    !IS_ENABLED(CONFIG_EXPERT))
> +		request_module_nowait("fbcon");
> +
> +	return drm_dp_aux_dev_init();
>  }
>  
>  static void __exit drm_kms_helper_exit(void)
> -- 
> 2.29.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

  reply	other threads:[~2021-02-03 10:35 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 18:14 module loader dead code removal and cleanups v2 Christoph Hellwig
2021-01-28 18:14 ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 01/13] powerpc/powernv: remove get_cxl_module Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 02/13] drm: remove drm_fb_helper_modinit Christoph Hellwig
2021-02-03 10:34   ` Daniel Vetter [this message]
2021-02-03 10:34     ` Daniel Vetter
2021-02-03 10:34     ` Daniel Vetter
2021-02-03 10:49     ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 03/13] module: unexport find_module and module_mutex Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-29 15:16   ` Miroslav Benes
2021-01-28 18:14 ` [PATCH 04/13] module: use RCU to synchronize find_module Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 20:50   ` Thiago Jung Bauermann
2021-01-28 20:50     ` Thiago Jung Bauermann
2021-01-28 20:50     ` Thiago Jung Bauermann
2021-01-29  5:10     ` Christoph Hellwig
2021-01-29  5:10       ` Christoph Hellwig
2021-01-29 21:29       ` Thiago Jung Bauermann
2021-01-29 21:29         ` Thiago Jung Bauermann
2021-01-29 10:04   ` Petr Mladek
2021-01-29 10:04     ` Petr Mladek
2021-01-29 15:29   ` Miroslav Benes
2021-02-01 11:46     ` Christoph Hellwig
2021-02-01 11:46       ` Christoph Hellwig
2021-02-01 12:10     ` Jessica Yu
2021-02-01 12:10       ` Jessica Yu
2021-02-01 12:10       ` Jessica Yu
2021-02-01 13:16       ` Miroslav Benes
2021-02-01 13:16         ` Miroslav Benes
2021-02-01 13:16         ` Miroslav Benes
2021-01-28 18:14 ` [PATCH 05/13] kallsyms: refactor {,module_}kallsyms_on_each_symbol Christoph Hellwig
2021-01-29  9:43   ` Petr Mladek
2021-02-01 11:47     ` Christoph Hellwig
2021-02-01 11:47       ` Christoph Hellwig
2021-02-01 13:37       ` Miroslav Benes
2021-02-01 13:37         ` Miroslav Benes
2021-02-01 13:37         ` Miroslav Benes
2021-02-01 16:28         ` Christoph Hellwig
2021-02-01 16:28           ` Christoph Hellwig
2021-02-02 10:45           ` Miroslav Benes
2021-02-02 10:45             ` Miroslav Benes
2021-02-02 10:45             ` Miroslav Benes
2021-02-01 14:02   ` Miroslav Benes
2021-02-01 14:02     ` Miroslav Benes
2021-02-01 14:02     ` Miroslav Benes
2021-01-28 18:14 ` [PATCH 06/13] kallsyms: only build {, module_}kallsyms_on_each_symbol when required Christoph Hellwig
2021-01-28 18:14 ` [PATCH 07/13] module: mark module_mutex static Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 08/13] module: remove each_symbol_in_section Christoph Hellwig
2021-01-28 18:14 ` [PATCH 09/13] module: merge each_symbol_section into find_symbol Christoph Hellwig
2021-01-28 18:14 ` [PATCH 10/13] module: pass struct find_symbol_args to find_symbol Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 11/13] module: move struct symsearch to module.c Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 12/13] module: remove EXPORT_SYMBOL_GPL_FUTURE Christoph Hellwig
2021-01-28 18:14   ` Christoph Hellwig
2021-01-28 18:14 ` [PATCH 13/13] module: remove EXPORT_UNUSED_SYMBOL* Christoph Hellwig
2021-02-02 12:13 module loader dead code removal and cleanups v3 Christoph Hellwig
2021-02-02 12:13 ` [PATCH 02/13] drm: remove drm_fb_helper_modinit Christoph Hellwig
2021-02-02 12:13   ` Christoph Hellwig

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