SWP_TYPE_SHIFT     24 include/linux/swapops.h #define SWP_OFFSET_MASK	((1UL << SWP_TYPE_SHIFT) - 1)
SWP_TYPE_SHIFT     33 include/linux/swapops.h 	ret.val = (type << SWP_TYPE_SHIFT) | (offset & SWP_OFFSET_MASK);
SWP_TYPE_SHIFT     43 include/linux/swapops.h 	return (entry.val >> SWP_TYPE_SHIFT);