Hi all, Yet another error on devm_gpio_request_one()... Interestingly the patch title says "export" but does not really export the symbol... Thanks, Fengguang --- Kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm head: 3ff60ad39879eca9c1016d6e29b007ddc8f6c922 commit: 779e06e1ecb540bcd1b1b8ea66f9fd96febbc898 [117/143] backlight: l4f00242t03: export and use devm_gpio_request_one() config: i386-allmodconfig (attached as .config) All related error/warning messages: ERROR: "devm_gpio_request_one" [drivers/video/backlight/l4f00242t03.ko] undefined! --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation