PTR_MASK          171 arch/alpha/include/asm/pgtable.h   ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
PTR_MASK          215 arch/openrisc/include/asm/pgtable.h ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)