In file included from arch/mips/ath79/machtypes.h:15:0, from arch/mips/ath79/mach-rbspi.c:40: arch/mips/ath79/mach-rbspi.c:463:51: error: 'rbxap_generic_setup' undeclared here (not in a function) MIPS_MACHINE_NONAME(ATH79_MACH_RB_CAPL, "cap-hb", rbxap_generic_setup); ^ ....