PTRS_PER_P4D      343 arch/s390/include/asm/pgtable.h #define PTRS_PER_P4D	_CRST_ENTRIES
PTRS_PER_P4D       63 arch/x86/include/asm/pgtable_64_types.h #define PTRS_PER_P4D		ptrs_per_p4d
PTRS_PER_P4D       12 include/asm-generic/5level-fixup.h #define PTRS_PER_P4D			1
PTRS_PER_P4D       13 include/asm-generic/pgtable-nop4d.h #define PTRS_PER_P4D		1