hugetlb: introduce generic version of huge_ptep_get_and_clear()
[muen/linux.git] / arch / sh / include / asm / hugetlb.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_SH_HUGETLB_H
3 #define _ASM_SH_HUGETLB_H
4
5 #include <asm/cacheflush.h>
6 #include <asm/page.h>
7
8 static inline int is_hugepage_only_range(struct mm_struct *mm,
9                                          unsigned long addr,
10                                          unsigned long len) {
11         return 0;
12 }
13
14 /*
15  * If the arch doesn't supply something else, assume that hugepage
16  * size aligned regions are ok without further preparation.
17  */
18 static inline int prepare_hugepage_range(struct file *file,
19                         unsigned long addr, unsigned long len)
20 {
21         if (len & ~HPAGE_MASK)
22                 return -EINVAL;
23         if (addr & ~HPAGE_MASK)
24                 return -EINVAL;
25         return 0;
26 }
27
28 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
29                                          unsigned long addr, pte_t *ptep)
30 {
31 }
32
33 static inline int huge_pte_none(pte_t pte)
34 {
35         return pte_none(pte);
36 }
37
38 static inline pte_t huge_pte_wrprotect(pte_t pte)
39 {
40         return pte_wrprotect(pte);
41 }
42
43 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
44                                            unsigned long addr, pte_t *ptep)
45 {
46         ptep_set_wrprotect(mm, addr, ptep);
47 }
48
49 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
50                                              unsigned long addr, pte_t *ptep,
51                                              pte_t pte, int dirty)
52 {
53         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
54 }
55
56 static inline pte_t huge_ptep_get(pte_t *ptep)
57 {
58         return *ptep;
59 }
60
61 static inline void arch_clear_hugepage_flags(struct page *page)
62 {
63         clear_bit(PG_dcache_clean, &page->flags);
64 }
65
66 #include <asm-generic/hugetlb.h>
67
68 #endif /* _ASM_SH_HUGETLB_H */