Hi Kbuild Test Robot,

drivers/mmc/host/jz4740_mmc.c: In function 'jz4740_mmc_set_ios':
drivers/mmc/host/jz4740_mmc.c:864:7: error: implicit declaration of 
function 'gpio_is_valid' [-Werror=implicit-function-declaration]

  if (gpio_is_valid(host->pdata->gpio_power))
  ^~~~~~~~~~~~~

Uuh, I'm sorry about that. Looks like I removed one header too much 
(<linux/gpio.h>).
My fault, lately I was testing with ci20_defconfig which doesn't enable 
this driver.

Should I send a v4?

Apologies,
-Paul