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hugetlb.h

#ifndef _ASM_POWERPC_HUGETLB_H
#define _ASM_POWERPC_HUGETLB_H

#include <asm/page.h>


int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
                     unsigned long len);

void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
                      unsigned long end, unsigned long floor,
                      unsigned long ceiling);

void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                 pte_t *ptep, pte_t pte);

pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
                        pte_t *ptep);

/*
 * If the arch doesn't supply something else, assume that hugepage
 * size aligned regions are ok without further preparation.
 */
static inline int prepare_hugepage_range(struct file *file,
                  unsigned long addr, unsigned long len)
{
      struct hstate *h = hstate_file(file);
      if (len & ~huge_page_mask(h))
            return -EINVAL;
      if (addr & ~huge_page_mask(h))
            return -EINVAL;
      return 0;
}

static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
{
}

static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                               unsigned long addr, pte_t *ptep)
{
}

static inline int huge_pte_none(pte_t pte)
{
      return pte_none(pte);
}

static inline pte_t huge_pte_wrprotect(pte_t pte)
{
      return pte_wrprotect(pte);
}

static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                                   unsigned long addr, pte_t *ptep,
                                   pte_t pte, int dirty)
{
      return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
}

static inline pte_t huge_ptep_get(pte_t *ptep)
{
      return *ptep;
}

static inline int arch_prepare_hugepage(struct page *page)
{
      return 0;
}

static inline void arch_release_hugepage(struct page *page)
{
}

#endif /* _ASM_POWERPC_HUGETLB_H */

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