RADIX_TREE_EXCEPTIONAL_SHIFT   20 include/linux/swapops.h 			(MAX_SWAPFILES_SHIFT + RADIX_TREE_EXCEPTIONAL_SHIFT))
RADIX_TREE_EXCEPTIONAL_SHIFT   93 include/linux/swapops.h 	entry.val = (unsigned long)arg >> RADIX_TREE_EXCEPTIONAL_SHIFT;
RADIX_TREE_EXCEPTIONAL_SHIFT  101 include/linux/swapops.h 	value = entry.val << RADIX_TREE_EXCEPTIONAL_SHIFT;