Quoting Krzysztof Kozlowski (2020-08-04 12:26:54) > The s3c_camif_gpio_put() declaration in > include/media/drv-intf/s3c_camif.h header was different than definition. > Fixing this allows to include that header to also fix the W=1 compile > warnings: > > arch/arm/mach-s3c24xx/setup-camif.c:28:5: warning: no previous prototype for 's3c_camif_gpio_get' [-Wmissing-prototypes] > 28 | int s3c_camif_gpio_get(void) > arch/arm/mach-s3c24xx/setup-camif.c:56:6: warning: no previous prototype for 's3c_camif_gpio_put' [-Wmissing-prototypes] > 56 | void s3c_camif_gpio_put(void) Maybe it should have been void all along?