register_winch_irq  285 arch/um/drivers/chan_user.c 		register_winch_irq(-1, fd, -1, port, 0);
register_winch_irq  294 arch/um/drivers/chan_user.c 		register_winch_irq(thread_fd, fd, thread, port, stack);
register_winch_irq   43 arch/um/drivers/chan_user.h extern void register_winch_irq(int fd, int tty_fd, int pid,