KERNEL_PGD_PTRS   163 arch/microblaze/include/asm/pgtable.h #define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
KERNEL_PGD_PTRS  1028 arch/x86/include/asm/pgtable.h #define KERNEL_PGD_PTRS		(PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)