MASTER_ICW4_DEFAULT  333 arch/x86/kernel/i8259.c 		outb_pic(MASTER_ICW4_DEFAULT | PIC_ICW4_AEOI, PIC_MASTER_IMR);
MASTER_ICW4_DEFAULT  335 arch/x86/kernel/i8259.c 		outb_pic(MASTER_ICW4_DEFAULT, PIC_MASTER_IMR);