linux/include/asm-generic/4level-fixup.h
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   1#ifndef _4LEVEL_FIXUP_H
   2#define _4LEVEL_FIXUP_H
   3
   4#define __ARCH_HAS_4LEVEL_HACK
   5#define __PAGETABLE_PUD_FOLDED
   6
   7#define PUD_SHIFT                       PGDIR_SHIFT
   8#define PUD_SIZE                        PGDIR_SIZE
   9#define PUD_MASK                        PGDIR_MASK
  10#define PTRS_PER_PUD                    1
  11
  12#define pud_t                           pgd_t
  13
  14#define pmd_alloc(mm, pud, address) \
  15        ((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
  16                NULL: pmd_offset(pud, address))
  17
  18#define pud_alloc(mm, pgd, address)     (pgd)
  19#define pud_offset(pgd, start)          (pgd)
  20#define pud_none(pud)                   0
  21#define pud_bad(pud)                    0
  22#define pud_present(pud)                1
  23#define pud_ERROR(pud)                  do { } while (0)
  24#define pud_clear(pud)                  pgd_clear(pud)
  25#define pud_val(pud)                    pgd_val(pud)
  26#define pud_populate(mm, pud, pmd)      pgd_populate(mm, pud, pmd)
  27#define pud_page(pud)                   pgd_page(pud)
  28#define pud_page_vaddr(pud)             pgd_page_vaddr(pud)
  29
  30#undef pud_free_tlb
  31#define pud_free_tlb(tlb, x, addr)      do { } while (0)
  32#define pud_free(mm, x)                 do { } while (0)
  33#define __pud_free_tlb(tlb, x, addr)    do { } while (0)
  34
  35#undef  pud_addr_end
  36#define pud_addr_end(addr, end)         (end)
  37
  38#endif
  39