hugetlb: introduce generic version of huge_ptep_clear_flush
[muen/linux.git] / arch / parisc / include / asm / hugetlb.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_PARISC64_HUGETLB_H
3 #define _ASM_PARISC64_HUGETLB_H
4
5 #include <asm/page.h>
6
7 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
8 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
9                      pte_t *ptep, pte_t pte);
10
11 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
12 pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
13                               pte_t *ptep);
14
15 static inline int is_hugepage_only_range(struct mm_struct *mm,
16                                          unsigned long addr,
17                                          unsigned long len) {
18         return 0;
19 }
20
21 /*
22  * If the arch doesn't supply something else, assume that hugepage
23  * size aligned regions are ok without further preparation.
24  */
25 static inline int prepare_hugepage_range(struct file *file,
26                         unsigned long addr, unsigned long len)
27 {
28         if (len & ~HPAGE_MASK)
29                 return -EINVAL;
30         if (addr & ~HPAGE_MASK)
31                 return -EINVAL;
32         return 0;
33 }
34
35 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
36 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
37                                          unsigned long addr, pte_t *ptep)
38 {
39 }
40
41 static inline int huge_pte_none(pte_t pte)
42 {
43         return pte_none(pte);
44 }
45
46 static inline pte_t huge_pte_wrprotect(pte_t pte)
47 {
48         return pte_wrprotect(pte);
49 }
50
51 void huge_ptep_set_wrprotect(struct mm_struct *mm,
52                                            unsigned long addr, pte_t *ptep);
53
54 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 static inline pte_t huge_ptep_get(pte_t *ptep)
59 {
60         return *ptep;
61 }
62
63 static inline void arch_clear_hugepage_flags(struct page *page)
64 {
65 }
66
67 #include <asm-generic/hugetlb.h>
68
69 #endif /* _ASM_PARISC64_HUGETLB_H */