extern int vr41xx_set_intassign(unsigned int irq, unsigned char intassign);
extern int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq));
extern int vr41xx_set_intassign(unsigned int irq, unsigned char intassign);
extern int vr41xx_cascade_irq(unsigned int irq, int (*get_irq_number)(int irq));