Re: [PATCH] ACPI: video: Fix name collision with architecture's video.o
From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: 2024-05-16 13:04:39
Also in:
dri-devel, intel-gfx, linux-acpi, linux-arch, lkml
CC Hans who has been doing the majority of the ACPI video work. On Thu, May 16, 2024 at 2:43 PM Thomas Zimmermann [off-list ref] wrote:
Commit 2fd001cd3600 ("arch: Rename fbdev header and source files")
renames the video source files under arch/ such that they does not
refer to fbdev any longer. The new files named video.o conflict with
ACPI's video.ko module.And surely nobody knew or was unable to check upfront that there was a video.ko already in the kernel.
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 this problem by renaming ACPI's video.ko to acpi_video.ko. Also rename a related source file and clean up the Makefile.
If you insist on renaming, rename it to backlight.c (and backlight_detect.c for consistency), because that's what it really is about.
quoted hunk ↗ jump to hunk
Reported-by: Chaitanya Kumar Borah <redacted> Closes: https://lore.kernel.org/intel-gfx/9dcac6e9-a3bf-4ace-bbdc-f697f767f9e0@suse.de/T/#t (local) Tested-by: Chaitanya Kumar Borah <redacted> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Fixes: 2fd001cd3600 ("arch: Rename fbdev header and source files") Cc: Arnd Bergmann <arnd@arndb.de> Cc: linux-arch@vger.kernel.org Cc: linux-fbdev@vger.kernel.org Cc: dri-devel@lists.freedesktop.org --- drivers/acpi/Makefile | 5 +++-- drivers/acpi/{acpi_video.c => acpi_video_core.c} | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) rename drivers/acpi/{acpi_video.c => acpi_video_core.c} (99%)diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 8cc8c0d9c8732..fc9e11f7afbf7 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile@@ -84,7 +84,9 @@ obj-$(CONFIG_ACPI_FAN) += fan.o fan-objs := fan_core.o fan-objs += fan_attr.o -obj-$(CONFIG_ACPI_VIDEO) += video.o +obj-$(CONFIG_ACPI_VIDEO) += acpi_video.o +acpi_video-objs += acpi_video_core.o video_detect.o + obj-$(CONFIG_ACPI_TAD) += acpi_tad.o obj-$(CONFIG_ACPI_PCI_SLOT) += pci_slot.o obj-$(CONFIG_ACPI_PROCESSOR) += processor.o@@ -124,7 +126,6 @@ obj-$(CONFIG_ACPI_CONFIGFS) += acpi_configfs.o obj-y += pmic/ -video-objs += acpi_video.o video_detect.o obj-y += dptf/ obj-$(CONFIG_ARM64) += arm64/diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video_core.c similarity index 99% rename from drivers/acpi/acpi_video.c rename to drivers/acpi/acpi_video_core.c index 1fda303882973..32bf81c5773a4 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video_core.c@@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-or-later /* - * video.c - ACPI Video Driver + * acpi_video_core.c - ACPI Video Driver * * Copyright (C) 2004 Luming Yu <luming.yu@intel.com> * Copyright (C) 2004 Bruno Ducrot <ducrot@poupinou.org> --2.45.0