From: David Gibson xics.c uses ppc64_boot_msg() without prototype, this fixes it by inclding . arch/ppc64/kernel/xics.c | 1 + 1 files changed, 1 insertion(+) diff -puN arch/ppc64/kernel/xics.c~ppc64-xics-warning-fix arch/ppc64/kernel/xics.c --- 25/arch/ppc64/kernel/xics.c~ppc64-xics-warning-fix 2003-05-22 00:13:15.000000000 -0700 +++ 25-akpm/arch/ppc64/kernel/xics.c 2003-05-22 00:13:15.000000000 -0700 @@ -25,6 +25,7 @@ #include #include #include +#include #include "i8259.h" _