PTRS_PER_PTE       35 arch/x86/include/asm/pgtable-2level_types.h #define PTRS_PER_PTE	1024
PTRS_PER_PTE       45 arch/x86/include/asm/pgtable-3level_types.h #define PTRS_PER_PTE	512
PTRS_PER_PTE       47 arch/x86/include/asm/pgtable_64_types.h #define PTRS_PER_PTE	512