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#include <linux/threads.h>
#include <linux/mm.h>

#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte)
#define pmd_populate(mm, pmd, pte) pmd_set(pmd, page_address(pte))
#define pmd_pgtable(pmd) pmd_page(pmd)

 * Allocate and free page tables.

static inline pgd_t *pgd_alloc (struct mm_struct *mm)
      return (pgd_t *)get_zeroed_page(GFP_KERNEL);

static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
      free_page((unsigned long)pgd);

static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
      pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
      return pte;

static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
      struct page *pte;
      pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
      return pte;

static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
      free_page((unsigned long)pte);

static inline void pte_free(struct mm_struct *mm, pgtable_t pte)

#define __pte_free_tlb(tlb,pte)                       \
do {                                      \
      pgtable_page_dtor(pte);                   \
      tlb_remove_page((tlb), pte);              \
} while (0)

#define check_pgt_cache()          do { } while (0)


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