SEQNR_MASK        218 mm/ksm.c       #define KSM_FLAG_MASK	(SEQNR_MASK|UNSTABLE_FLAG|STABLE_FLAG)
SEQNR_MASK       1980 mm/ksm.c       	rmap_item->address |= (ksm_scan.seqnr & SEQNR_MASK);