hugetlb: introduce generic version of prepare_hugepage_range
[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 #define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
19 static inline int prepare_hugepage_range(struct file *file,
20                         unsigned long addr, unsigned long len)
21 {
22         if (len & ~HPAGE_MASK)
23                 return -EINVAL;
24         if (addr & ~HPAGE_MASK)
25                 return -EINVAL;
26         return 0;
27 }
28
29 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
30 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
31                                          unsigned long addr, pte_t *ptep)
32 {
33 }
34
35 static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
36                                            unsigned long addr, pte_t *ptep)
37 {
38         ptep_set_wrprotect(mm, addr, ptep);
39 }
40
41 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
42                                              unsigned long addr, pte_t *ptep,
43                                              pte_t pte, int dirty)
44 {
45         return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
46 }
47
48 static inline pte_t huge_ptep_get(pte_t *ptep)
49 {
50         return *ptep;
51 }
52
53 static inline void arch_clear_hugepage_flags(struct page *page)
54 {
55         clear_bit(PG_dcache_clean, &page->flags);
56 }
57
58 #include <asm-generic/hugetlb.h>
59
60 #endif /* _ASM_SH_HUGETLB_H */