text: #ifndef _ASM_SPARC64_HUGETLB_H
  #define _ASM_SPARC64_HUGETLB_H
  
  #include <asm/page.h>
  #include <asm-generic/hugetlb.h>
  
  
  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);
  
  static inline int is_hugepage_only_range(struct mm_struct *mm,
  					 unsigned long addr,
  					 unsigned long len) {
  	return 0;
  }
  
  /*
   * 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 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 void huge_ptep_set_wrprotect(struct mm_struct *mm,
  					   unsigned long addr, pte_t *ptep)
  {
  	pte_t old_pte = *ptep;
  	set_huge_pte_at(mm, addr, ptep, pte_wrprotect(old_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)
  {
  	int changed = !pte_same(*ptep, pte);
  	if (changed) {
  		set_huge_pte_at(vma->vm_mm, addr, ptep, pte);
  		flush_tlb_page(vma, addr);
  	}
  	return changed;
  }
  
  static inline pte_t huge_ptep_get(pte_t *ptep)
  {
  	return *ptep;
  }
  
  static inline void arch_clear_hugepage_flags(struct page *page)
  {
  }
  
  void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
  			    unsigned long end, unsigned long floor,
  			    unsigned long ceiling);
  
  #endif /* _ASM_SPARC64_HUGETLB_H */
  