When building with W=1: arch/m68k/mm/hwtest.c:29:5: warning: no previous prototype for ‘hwreg_present’ [-Wmissing-prototypes] 29 | int hwreg_present(volatile void *regp) | ^~~~~~~~~~~~~ arch/m68k/mm/hwtest.c:62:5: warning: no previous prototype for ‘hwreg_write’ [-Wmissing-prototypes] 62 | int hwreg_write(volatile void *regp, unsigned short val) | ^~~~~~~~~~~ Fix this by including <asm/hwtest.h>. Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> --- arch/m68k/mm/hwtest.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/m68k/mm/hwtest.c b/arch/m68k/mm/hwtest.c index fe99aa99987e9c38..8ee7a336868868bb 100644 --- a/arch/m68k/mm/hwtest.c +++ b/arch/m68k/mm/hwtest.c @@ -26,6 +26,8 @@ #include <linux/module.h> +#include <asm/hwtest.h> + int hwreg_present(volatile void *regp) { int ret = 0; -- 2.34.1