On Sun, Feb 16, 2014 at 04:01:28PM +0800, Huacai Chen wrote: > diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c > index 81ba3b4..a7c521b 100644 > --- a/arch/mips/loongson/common/init.c > +++ b/arch/mips/loongson/common/init.c > @@ -33,6 +33,9 @@ void __init prom_init(void) > > /*init the uart base address */ > prom_init_uart_base(); > +#if defined(CONFIG_SMP) > + register_smp_ops(&loongson3_smp_ops); > +#endif For the non-CONFIG_CPU case register_smp_ops() is defined as static inline void register_smp_ops(struct plat_smp_ops *ops) { } So this #ifdef should not be required and the reference to loongson3_smp_ops be dropped. Ralf