tag	line	file	source code
rdusp	95	arch/alpha/kernel/process.c	rdusp(),
rdusp	179	arch/alpha/kernel/process.c	newsp = rdusp();
rdusp	302	arch/alpha/kernel/signal.c	frame = (struct sigcontext_struct *) rdusp();
rdusp	37	include/asm-alpha/system.h	extern unsigned long rdusp(void);