#ifndef _4LEVEL_FIXUP_H
  #define _4LEVEL_FIXUP_H
  
  #define __ARCH_HAS_4LEVEL_HACK
  #define __PAGETABLE_PUD_FOLDED
  
  #define PUD_SIZE			PGDIR_SIZE
  #define PUD_MASK			PGDIR_MASK
  #define PTRS_PER_PUD			1
  
  #define pud_t				pgd_t

  #define pmd_alloc(mm, pud, address) \
  	((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
   		NULL: pmd_offset(pud, address))

  
  #define pud_alloc(mm, pgd, address)	(pgd)
  #define pud_offset(pgd, start)		(pgd)
  #define pud_none(pud)			0
  #define pud_bad(pud)			0
  #define pud_present(pud)		1
  #define pud_ERROR(pud)			do { } while (0)
  #define pud_clear(pud)			pgd_clear(pud)

  #define pud_val(pud)			pgd_val(pud)
  #define pud_populate(mm, pud, pmd)	pgd_populate(mm, pud, pmd)
  #define pud_page(pud)			pgd_page(pud)
  #define pud_page_vaddr(pud)		pgd_page_vaddr(pud)

  
  #undef pud_free_tlb

  #define pud_free_tlb(tlb, x, addr)	do { } while (0)

  #define pud_free(mm, x)			do { } while (0)

  #define __pud_free_tlb(tlb, x, addr)	do { } while (0)

  
  #undef  pud_addr_end
  #define pud_addr_end(addr, end)		(end)
  
  #endif