extern int cont(int pid);
extern void check_sigio(void);
extern void arch_check_bugs(void);
-extern int cpu_feature(char *what, char *buf, int len);
extern int arch_handle_signal(int sig, union uml_pt_regs *regs);
extern int arch_fixup(unsigned long address, void *sc_ptr);
extern void arch_init_thread(void);