The powerpc ppc6xx_defconfig builds failed on today's Linux next tag next-20240304. Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx> Build log: --------- drivers/video/fbdev/chipsfb.c: In function 'chipsfb_pci_init': drivers/video/fbdev/chipsfb.c:401:31: error: invalid use of undefined type 'struct backlight_device' 401 | pmac_backlight->props.power = FB_BLANK_UNBLANK; | ^~ Steps to reproduce: # tuxmake --runtime podman --target-arch powerpc --toolchain gcc-13 --kconfig ppc6xx_defconfig - https://storage.tuxsuite.com/public/linaro/lkft/builds/2dDE297yLFrAr3gigIDy8tIleDh/tuxmake_reproducer.sh Links: - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240304/testrun/22919857/suite/build/test/gcc-13-ppc6xx_defconfig/details/ - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240304/testrun/22919857/suite/build/test/gcc-13-ppc6xx_defconfig/log - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240304/testrun/22919857/suite/build/test/gcc-13-ppc6xx_defconfig/history/ -- Linaro LKFT https://lkft.linaro.org