no_action 81 arch/x86/kernel/irqinit_32.c .handler = no_action, no_action 113 arch/x86/kernel/irqinit_64.c .handler = no_action, no_action 655 arch/x86/kernel/visws_quirks.c .handler = no_action, no_action 22 arch/x86/mach-voyager/setup.c .handler = no_action, no_action 71 include/linux/interrupt.h extern irqreturn_t no_action(int cpl, void *dev_id);