1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KHUGEPAGED_H
3 #define _LINUX_KHUGEPAGED_H
4
5 #include <linux/mm.h>
6
7 extern unsigned int khugepaged_max_ptes_none __read_mostly;
8 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
9 extern struct attribute_group khugepaged_attr_group;
10
11 extern int khugepaged_init(void);
12 extern void khugepaged_destroy(void);
13 extern int start_stop_khugepaged(void);
14 extern void __khugepaged_enter(struct mm_struct *mm);
15 extern void __khugepaged_exit(struct mm_struct *mm);
16 extern void khugepaged_enter_vma(struct vm_area_struct *vma,
17 vm_flags_t vm_flags);
18 extern void khugepaged_min_free_kbytes_update(void);
19 extern bool current_is_khugepaged(void);
20 extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
21 bool install_pmd);
22
khugepaged_fork(struct mm_struct * mm,struct mm_struct * oldmm)23 static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
24 {
25 if (mm_flags_test(MMF_VM_HUGEPAGE, oldmm))
26 __khugepaged_enter(mm);
27 }
28
khugepaged_exit(struct mm_struct * mm)29 static inline void khugepaged_exit(struct mm_struct *mm)
30 {
31 if (mm_flags_test(MMF_VM_HUGEPAGE, mm))
32 __khugepaged_exit(mm);
33 }
34 #else /* CONFIG_TRANSPARENT_HUGEPAGE */
khugepaged_fork(struct mm_struct * mm,struct mm_struct * oldmm)35 static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
36 {
37 }
khugepaged_exit(struct mm_struct * mm)38 static inline void khugepaged_exit(struct mm_struct *mm)
39 {
40 }
khugepaged_enter_vma(struct vm_area_struct * vma,vm_flags_t vm_flags)41 static inline void khugepaged_enter_vma(struct vm_area_struct *vma,
42 vm_flags_t vm_flags)
43 {
44 }
collapse_pte_mapped_thp(struct mm_struct * mm,unsigned long addr,bool install_pmd)45 static inline int collapse_pte_mapped_thp(struct mm_struct *mm,
46 unsigned long addr, bool install_pmd)
47 {
48 return 0;
49 }
50
khugepaged_min_free_kbytes_update(void)51 static inline void khugepaged_min_free_kbytes_update(void)
52 {
53 }
54
current_is_khugepaged(void)55 static inline bool current_is_khugepaged(void)
56 {
57 return false;
58 }
59 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
60
61 #endif /* _LINUX_KHUGEPAGED_H */
62