ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET,  (1 << irq)); 
ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET, (1 << irq)); 
static void ixp2000_irq_unmask(unsigned int irq){	ixp2000_reg_write(IXP2000_IRQ_ENABLE_SET,  (1 << irq));}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/c4982887cacf2122bc256e901598b58caf4a34be/core.c/buggy/arch/arm/mach-ixp2000/core.c