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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
ba76149f AA |
2 | #ifndef _LINUX_KHUGEPAGED_H |
3 | #define _LINUX_KHUGEPAGED_H | |
4 | ||
f7ccbae4 | 5 | #include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */ |
ba76149f AA |
6 | |
7 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE | |
b46e756f KS |
8 | extern struct attribute_group khugepaged_attr_group; |
9 | ||
10 | extern int khugepaged_init(void); | |
11 | extern void khugepaged_destroy(void); | |
12 | extern int start_stop_khugepaged(void); | |
d2081b2b | 13 | extern void __khugepaged_enter(struct mm_struct *mm); |
ba76149f | 14 | extern void __khugepaged_exit(struct mm_struct *mm); |
c791576c YS |
15 | extern void khugepaged_enter_vma(struct vm_area_struct *vma, |
16 | unsigned long vm_flags); | |
4aab2be0 | 17 | extern void khugepaged_min_free_kbytes_update(void); |
57e9cc50 | 18 | extern bool current_is_khugepaged(void); |
27e1f827 | 19 | #ifdef CONFIG_SHMEM |
34488399 ZK |
20 | extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, |
21 | bool install_pmd); | |
27e1f827 | 22 | #else |
34488399 ZK |
23 | static inline int collapse_pte_mapped_thp(struct mm_struct *mm, |
24 | unsigned long addr, bool install_pmd) | |
27e1f827 | 25 | { |
34488399 | 26 | return 0; |
27e1f827 SL |
27 | } |
28 | #endif | |
ba76149f | 29 | |
d2081b2b | 30 | static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) |
ba76149f AA |
31 | { |
32 | if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags)) | |
d2081b2b | 33 | __khugepaged_enter(mm); |
ba76149f AA |
34 | } |
35 | ||
36 | static inline void khugepaged_exit(struct mm_struct *mm) | |
37 | { | |
38 | if (test_bit(MMF_VM_HUGEPAGE, &mm->flags)) | |
39 | __khugepaged_exit(mm); | |
40 | } | |
ba76149f | 41 | #else /* CONFIG_TRANSPARENT_HUGEPAGE */ |
d2081b2b | 42 | static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) |
ba76149f | 43 | { |
ba76149f AA |
44 | } |
45 | static inline void khugepaged_exit(struct mm_struct *mm) | |
46 | { | |
47 | } | |
c791576c YS |
48 | static inline void khugepaged_enter_vma(struct vm_area_struct *vma, |
49 | unsigned long vm_flags) | |
ba76149f | 50 | { |
ba76149f | 51 | } |
34488399 ZK |
52 | static inline int collapse_pte_mapped_thp(struct mm_struct *mm, |
53 | unsigned long addr, bool install_pmd) | |
27e1f827 | 54 | { |
34488399 | 55 | return 0; |
27e1f827 | 56 | } |
4aab2be0 VB |
57 | |
58 | static inline void khugepaged_min_free_kbytes_update(void) | |
59 | { | |
60 | } | |
57e9cc50 JW |
61 | |
62 | static inline bool current_is_khugepaged(void) | |
63 | { | |
64 | return false; | |
65 | } | |
ba76149f AA |
66 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
67 | ||
68 | #endif /* _LINUX_KHUGEPAGED_H */ |