ZONEID_SHIFT      479 include/linux/mm.h #define ZONEID_PGSHIFT		(ZONEID_PGOFF * (ZONEID_SHIFT != 0))
ZONEID_SHIFT      488 include/linux/mm.h #define ZONEID_MASK		((1UL << ZONEID_SHIFT) - 1)
ZONEID_SHIFT       92 mm/mm_init.c   		(unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT));