extern void sigio_handler(int sig, union uml_pt_regs *regs);
extern int activate_fd(int irq, int fd, int type, void *dev_id);
extern void sigio_handler(int sig, union uml_pt_regs *regs);
extern int activate_fd(int irq, int fd, int type, void *dev_id);
extern void free_irq_by_fd(int fd);
extern void reactivate_fd(int fd, int irqnum);
extern void deactivate_fd(int fd, int irqnum);
extern void free_irq_by_fd(int fd);
extern void reactivate_fd(int fd, int irqnum);
extern void deactivate_fd(int fd, int irqnum);
extern void forward_interrupts(int pid);
extern void init_irq_signals(int on_sigstack);
extern void forward_ipi(int fd, int pid);
extern void forward_interrupts(int pid);
extern void init_irq_signals(int on_sigstack);
extern void forward_ipi(int fd, int pid);