tag	line	file	source code
TIMER_IRQ	27	arch/alpha/kernel/time.c	#define TIMER_IRQ 0
TIMER_IRQ	27	arch/i386/kernel/time.c	#define TIMER_IRQ 0
TIMER_IRQ	21	arch/sparc/kernel/time.c	#define TIMER_IRQ  10    /* Also at level 14, but we ignore that one. */