randconfig builds occasionally produce this Kconfig warning: warning: (DRM_RADEON && DRM_AMDGPU && DRM_NOUVEAU && DRM_I915 && DRM_GMA500 && DRM_SHMOBILE && DRM_TILCDC && DRM_FSL_DCU && DRM_TINYDRM && DRM_PARADE_PS8622 && FB_BACKLIGHT && FB_ARMCLCD && FB_MX3 && USB_APPLEDISPLAY && FB_OLPC_DCON && ACPI_CMPC && SAMSUNG_Q10) selects BACKLIGHT_CLASS_DEVICE which has unmet direct dependencies (HAS_IOMEM && BACKLIGHT_LCD_SUPPORT) It turns out that amost all users of BACKLIGHT_CLASS_DEVICE also select BACKLIGHT_LCD_SUPPORT, but not all of them do. This makes the remaining ones behave like the others. It would probably be best to rework the way those two options related entirely, but for now this takes the simpler and safer approach to fix the warnings without introducing regressions. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- drivers/gpu/drm/gma500/Kconfig | 1 + drivers/platform/x86/Kconfig | 2 ++ drivers/staging/olpc_dcon/Kconfig | 1 + 3 files changed, 4 insertions(+) diff --git a/drivers/gpu/drm/gma500/Kconfig b/drivers/gpu/drm/gma500/Kconfig index df11582f1efc..52d855cb0569 100644 --- a/drivers/gpu/drm/gma500/Kconfig +++ b/drivers/gpu/drm/gma500/Kconfig @@ -6,6 +6,7 @@ config DRM_GMA500 # GMA500 depends on ACPI_VIDEO when ACPI is enabled, just like i915 select ACPI_VIDEO if ACPI select BACKLIGHT_CLASS_DEVICE if ACPI + select BACKLIGHT_LCD_SUPPORT if ACPI select INPUT if ACPI help Say yes for an experimental 2D KMS framebuffer driver for the diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 80b87954f6dd..e0ca673bf564 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -785,6 +785,7 @@ config ACPI_CMPC depends on RFKILL || RFKILL=n select INPUT select BACKLIGHT_CLASS_DEVICE + select BACKLIGHT_LCD_SUPPORT default n help Support for Intel Classmate PC ACPI devices, including some @@ -1000,6 +1001,7 @@ config SAMSUNG_Q10 tristate "Samsung Q10 Extras" depends on ACPI select BACKLIGHT_CLASS_DEVICE + select BACKLIGHT_LCD_SUPPORT ---help--- This driver provides support for backlight control on Samsung Q10 and related laptops, including Dell Latitude X200. diff --git a/drivers/staging/olpc_dcon/Kconfig b/drivers/staging/olpc_dcon/Kconfig index d277f048789e..845f756886f0 100644 --- a/drivers/staging/olpc_dcon/Kconfig +++ b/drivers/staging/olpc_dcon/Kconfig @@ -4,6 +4,7 @@ config FB_OLPC_DCON depends on I2C depends on (GPIO_CS5535 || GPIO_CS5535=n) select BACKLIGHT_CLASS_DEVICE + select BACKLIGHT_LCD_SUPPORT ---help--- In order to support very low power operation, the XO laptop uses a secondary Display CONtroller, or DCON. This secondary controller -- 2.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
