#ifndef SMPBOOT_H#define SMPBOOT_H struct task_struct; int smpboot_prepare(unsigned int cpu); #ifdef CONFIG_GENERIC_SMP_IDLE_THREADstruct task_struct *idle_thread_get(unsigned int cpu);void idle_thread_set_boot_cpu(void);void idle_threads_init(void);#elsestatic inline struct task_struct *idle_thread_get(unsigned int cpu) { return NULL; }static inline void idle_thread_set_boot_cpu(void) { }static inline void idle_threads_init(void) { }#endif #endif