Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc
[pandora-kernel.git] / include / asm-powerpc / hugetlb.h
1 #ifndef _ASM_POWERPC_HUGETLB_H
2 #define _ASM_POWERPC_HUGETLB_H
3
4 #include <asm/page.h>
5
6
7 int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr,
8                            unsigned long len);
9
10 void hugetlb_free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
11                             unsigned long end, unsigned long floor,
12                             unsigned long ceiling);
13
14 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
15                      pte_t *ptep, pte_t pte);
16
17 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
18                               pte_t *ptep);
19
20 /*
21  * If the arch doesn't supply something else, assume that hugepage
22  * size aligned regions are ok without further preparation.
23  */
24 static inline int prepare_hugepage_range(struct file *file,
25                         unsigned long addr, unsigned long len)
26 {
27         struct hstate *h = hstate_file(file);
28         if (len & ~huge_page_mask(h))
29                 return -EINVAL;
30         if (addr & ~huge_page_mask(h))
31                 return -EINVAL;
32         return 0;
33 }
34
35 static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm)
36 {
37 }
38
39 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
40                                          unsigned long addr, pte_t *ptep)
41 {
42 }
43
44 static inline int huge_pte_none(pte_t pte)
45 {
46         return pte_none(pte);
47 }
48
49 static inline pte_t huge_pte_wrprotect(pte_t pte)
50 {
51         return pte_wrprotect(pte);
52 }
53
54 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
55                                              unsigned long addr, pte_t *ptep,
56                                              pte_t pte, int dirty)
57 {
58         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
59 }
60
61 static inline pte_t huge_ptep_get(pte_t *ptep)
62 {
63         return *ptep;
64 }
65
66 static inline int arch_prepare_hugepage(struct page *page)
67 {
68         return 0;
69 }
70
71 static inline void arch_release_hugepage(struct page *page)
72 {
73 }
74
75 #endif /* _ASM_POWERPC_HUGETLB_H */