Hi Kuninori, FYI, kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git for-next head: c9bcf5cde5267509957099558f00400ede028cc5 commit: 6e20a0a429bd4dc07d6de16d9c247270e04e4aa0 [9/33] gpio: pcf857x: enable gpio_to_irq() support config: x86_64-randconfig-s313 (attached as .config) All related error/warning messages: ERROR: "irq_set_chip_and_handler_name" [drivers/gpio/gpio-pcf857x.ko] undefined! ERROR: "dummy_irq_chip" [drivers/gpio/gpio-pcf857x.ko] undefined! --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation