1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KHUGEPAGED_H
3 #define _LINUX_KHUGEPAGED_H
4
5 extern unsigned int khugepaged_max_ptes_none __read_mostly;
6 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
7 extern struct attribute_group khugepaged_attr_group;
8
9 extern int khugepaged_init(void);
10 extern void khugepaged_destroy(void);
11 extern int start_stop_khugepaged(void);
12 extern void __khugepaged_enter(struct mm_struct *mm);
13 extern void __khugepaged_exit(struct mm_struct *mm);
14 extern void khugepaged_enter_vma(struct vm_area_struct *vma,
15 unsigned long vm_flags);
16 extern void khugepaged_min_free_kbytes_update(void);
17 extern bool current_is_khugepaged(void);
18 extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
19 bool install_pmd);
20
khugepaged_fork(struct mm_struct * mm,struct mm_struct * oldmm)21 static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
22 {
23 if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags))
24 __khugepaged_enter(mm);
25 }
26
khugepaged_exit(struct mm_struct * mm)27 static inline void khugepaged_exit(struct mm_struct *mm)
28 {
29 if (test_bit(MMF_VM_HUGEPAGE, &mm->flags))
30 __khugepaged_exit(mm);
31 }
32 #else /* CONFIG_TRANSPARENT_HUGEPAGE */
khugepaged_fork(struct mm_struct * mm,struct mm_struct * oldmm)33 static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
34 {
35 }
khugepaged_exit(struct mm_struct * mm)36 static inline void khugepaged_exit(struct mm_struct *mm)
37 {
38 }
khugepaged_enter_vma(struct vm_area_struct * vma,unsigned long vm_flags)39 static inline void khugepaged_enter_vma(struct vm_area_struct *vma,
40 unsigned long vm_flags)
41 {
42 }
collapse_pte_mapped_thp(struct mm_struct * mm,unsigned long addr,bool install_pmd)43 static inline int collapse_pte_mapped_thp(struct mm_struct *mm,
44 unsigned long addr, bool install_pmd)
45 {
46 return 0;
47 }
48
khugepaged_min_free_kbytes_update(void)49 static inline void khugepaged_min_free_kbytes_update(void)
50 {
51 }
52
current_is_khugepaged(void)53 static inline bool current_is_khugepaged(void)
54 {
55 return false;
56 }
57 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
58
59 #endif /* _LINUX_KHUGEPAGED_H */
60