linux-kernel - Re: [PATCH] arch: Fix name collision with ACPI's video.o

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Date: Fri, 17 May 2024 15:54:35 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: Thomas Zimmermann <tzimmermann@...e.de>, arnd@...db.de,
 chaitanya.kumar.borah@...el.com, suresh.kumar.kurmi@...el.com,
 jani.saarinen@...el.com, davem@...emloft.net, andreas@...sler.com,
 tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com, rafael@...nel.org
Cc: linux-arch@...r.kernel.org, sparclinux@...r.kernel.org,
 linux-acpi@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
 linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arch: Fix name collision with ACPI's video.o

Hi,

On 5/17/24 11:14 AM, Thomas Zimmermann wrote:
> Commit 2fd001cd3600 ("arch: Rename fbdev header and source files")
> renames the video source files under arch/ such that they do not
> refer to fbdev any longer. The new files named video.o conflict with
> ACPI's video.ko module. Modprobing the ACPI module can then fail with
> warnings about missing symbols, as shown below.
> 
>   (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_unregister (err -2)
>   (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_register_backlight (err -2)
>   (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol __acpi_video_get_backlight_type (err -2)
>   (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_register (err -2)
> 
> Fix the issue by renaming the architecture's video.o to video-common.o.
> 
> Reported-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@...el.com>
> Closes: https://lore.kernel.org/intel-gfx/9dcac6e9-a3bf-4ace-bbdc-f697f767f9e0@suse.de/T/#t
> Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
> Fixes: 2fd001cd3600 ("arch: Rename fbdev header and source files")
> Cc: Arnd Bergmann <arnd@...db.de>
> Cc: linux-arch@...r.kernel.org
> Cc: linux-fbdev@...r.kernel.org
> Cc: dri-devel@...ts.freedesktop.org

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans




> ---
>  arch/sparc/video/Makefile                    | 2 +-
>  arch/sparc/video/{video.c => video-common.c} | 0
>  arch/x86/video/Makefile                      | 2 +-
>  arch/x86/video/{video.c => video-common.c}   | 0
>  4 files changed, 2 insertions(+), 2 deletions(-)
>  rename arch/sparc/video/{video.c => video-common.c} (100%)
>  rename arch/x86/video/{video.c => video-common.c} (100%)
> 
> diff --git a/arch/sparc/video/Makefile b/arch/sparc/video/Makefile
> index fdf83a408d750..dcfbe7a5912c0 100644
> --- a/arch/sparc/video/Makefile
> +++ b/arch/sparc/video/Makefile
> @@ -1,3 +1,3 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  
> -obj-y	+= video.o
> +obj-y	+= video-common.o
> diff --git a/arch/sparc/video/video.c b/arch/sparc/video/video-common.c
> similarity index 100%
> rename from arch/sparc/video/video.c
> rename to arch/sparc/video/video-common.c
> diff --git a/arch/x86/video/Makefile b/arch/x86/video/Makefile
> index fdf83a408d750..dcfbe7a5912c0 100644
> --- a/arch/x86/video/Makefile
> +++ b/arch/x86/video/Makefile
> @@ -1,3 +1,3 @@
>  # SPDX-License-Identifier: GPL-2.0-only
>  
> -obj-y	+= video.o
> +obj-y	+= video-common.o
> diff --git a/arch/x86/video/video.c b/arch/x86/video/video-common.c
> similarity index 100%
> rename from arch/x86/video/video.c
> rename to arch/x86/video/video-common.c