If CONFIG_ACPI=n and CONFIG_BACKLIGHT_CLASS_DEVICE=m, compilation complains
with undefined references:
drivers/gpu/drm/i915/display/intel_panel.o: In function
`intel_backlight_device_register':
intel_panel.c:(.text+0x4dd9): undefined reference to `backlight_device_register'
drivers/gpu/drm/i915/display/intel_panel.o: In function
`intel_backlight_device_unregister':
intel_panel.c:(.text+0x4e96): undefined reference to
`backlight_device_unregister'
This patch select BACKLIGHT_CLASS_DEVICE directly.
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Chen Zhou <chenzho...@huawei.com>
---
drivers/gpu/drm/i915/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index ba95959..6b69dab 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -16,7 +16,7 @@ config DRM_I915
select IRQ_WORK
# i915 depends on ACPI_VIDEO when ACPI is enabled
# but for select to work, need to select ACPI_VIDEO's dependencies, ick
- select BACKLIGHT_CLASS_DEVICE if ACPI
+ select BACKLIGHT_CLASS_DEVICE
select INPUT if ACPI
select ACPI_VIDEO if ACPI
select ACPI_BUTTON if ACPI
--
2.7.4
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