MAX_SWAPFILES_SHIFT  105 arch/x86/include/asm/pgtable-2level.h #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
MAX_SWAPFILES_SHIFT  192 arch/x86/include/asm/pgtable-3level.h #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > 5)
MAX_SWAPFILES_SHIFT  156 arch/x86/include/asm/pgtable_64.h #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS)
MAX_SWAPFILES_SHIFT   74 include/linux/swap.h 	((1 << MAX_SWAPFILES_SHIFT) - SWP_MIGRATION_NUM - SWP_HWPOISON_NUM)
MAX_SWAPFILES_SHIFT   20 include/linux/swapops.h 			(MAX_SWAPFILES_SHIFT + RADIX_TREE_EXCEPTIONAL_SHIFT))