if (size == 0) return 0;  
static inline int cross_bound(unsigned long addr, unsigned int size){	if (size > PAGE_SIZE)		return 1;	if (addr >> PAGE_SHIFT != (addr + size - 1) >> PAGE_SHIFT)		return 1;	return 0;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/74a01d11c92c06a0ceac88ca306d507a8186e7f6/ohci1394.h/clean/drivers/ieee1394/ohci1394.h