tag	line	file	source code
WNOHANG	180	arch/i386/kernel/signal.c	while (sys_waitpid(-1,NULL,WNOHANG) > 0)
WNOHANG	228	arch/mips/kernel/signal.c	while (sys_waitpid(-1,NULL,WNOHANG) > 0)
WNOHANG	553	kernel/exit.c	if (options & WNOHANG)