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9#ifndef __ASM_HUGETLB_H
10#define __ASM_HUGETLB_H
11
12#include <asm/page.h>
13
14#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
15static inline int prepare_hugepage_range(struct file *file,
16 unsigned long addr,
17 unsigned long len)
18{
19 unsigned long task_size = STACK_TOP;
20 struct hstate *h = hstate_file(file);
21
22 if (len & ~huge_page_mask(h))
23 return -EINVAL;
24 if (addr & ~huge_page_mask(h))
25 return -EINVAL;
26 if (len > task_size)
27 return -ENOMEM;
28 if (task_size - len < addr)
29 return -EINVAL;
30 return 0;
31}
32
33#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
34static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
35 unsigned long addr, pte_t *ptep)
36{
37 pte_t clear;
38 pte_t pte = *ptep;
39
40 pte_val(clear) = (unsigned long)invalid_pte_table;
41 set_pte_at(mm, addr, ptep, clear);
42 return pte;
43}
44
45#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
46static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
47 unsigned long addr, pte_t *ptep)
48{
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53
54 huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
55 flush_tlb_page(vma, addr);
56}
57
58#define __HAVE_ARCH_HUGE_PTE_NONE
59static inline int huge_pte_none(pte_t pte)
60{
61 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
62 return !val || (val == (unsigned long)invalid_pte_table);
63}
64
65#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
66static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
67 unsigned long addr,
68 pte_t *ptep, pte_t pte,
69 int dirty)
70{
71 int changed = !pte_same(*ptep, pte);
72
73 if (changed) {
74 set_pte_at(vma->vm_mm, addr, ptep, pte);
75
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77
78
79 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
80 }
81 return changed;
82}
83
84#include <asm-generic/hugetlb.h>
85
86#endif
87