arch/x86/include/asm/hugetlb.h

   1 #ifndef _ASM_X86_HUGETLB_H
   2 #define _ASM_X86_HUGETLB_H
   3
   4 #include <asm/page.h>
   5
   6
   7 static inline int is_hugepage_only_range(struct mm_struct *mm,
   8                                          unsigned long addr,
   9                                          unsigned long len) {
  10         return 0;
  11 }
  12
  13 /*
  14  * If the arch doesn't supply something else, assume that hugepage
  15  * size aligned regions are ok without further preparation.
  16  */
  17 static inline int prepare_hugepage_range(struct file *file,
  18                         unsigned long addr, unsigned long len)
  19 {
  20         struct hstate *h = hstate_file(file);
  21         if (len & ~huge_page_mask(h))
  22                 return -EINVAL;
  23         if (addr & ~huge_page_mask(h))
  24                 return -EINVAL;
  25         return 0;
  26 }
  27
  28 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) {
  29 }
  30
  31 static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
  32                                           unsigned long addr, unsigned long end,
  33                                           unsigned long floor,
  34                                           unsigned long ceiling)
  35 {
  36         free_pgd_range(tlb, addr, end, floor, ceiling);
  37 }
  38
  39 static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
  40                                    pte_t *ptep, pte_t pte)
  41 {
  42         set_pte_at(mm, addr, ptep, pte);
  43 }
  44
  45 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
  46                                             unsigned long addr, pte_t *ptep)
  47 {
  48         return ptep_get_and_clear(mm, addr, ptep);
  49 }
  50
  51 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
  52                                          unsigned long addr, pte_t *ptep)
  53 {
  54 }
  55
  56 static inline int huge_pte_none(pte_t pte)
  57 {
  58         return pte_none(pte);
  59 }
  60
  61 static inline pte_t huge_pte_wrprotect(pte_t pte)
  62 {
  63         return pte_wrprotect(pte);
  64 }
  65
  66 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
  67                                            unsigned long addr, pte_t *ptep)
  68 {
  69         ptep_set_wrprotect(mm, addr, ptep);
  70 }
  71
  72 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
  73                                              unsigned long addr, pte_t *ptep,
  74                                              pte_t pte, int dirty)
  75 {
  76         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
  77 }
  78
  79 static inline pte_t huge_ptep_get(pte_t *ptep)
  80 {
  81         return *ptep;
  82 }
  83
  84 static inline int arch_prepare_hugepage(struct page *page)
  85 {
  86         return 0;
  87 }
  88
  89 static inline void arch_release_hugepage(struct page *page)
  90 {
  91 }
  92
  93 #endif /* _ASM_X86_HUGETLB_H */