zba              2658 mm/memory.c    	pgoff_t vba, vea, zba, zea;
zba              2665 mm/memory.c    		zba = details->first_index;
zba              2666 mm/memory.c    		if (zba < vba)
zba              2667 mm/memory.c    			zba = vba;
zba              2673 mm/memory.c    			((zba - vba) << PAGE_SHIFT) + vma->vm_start,