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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_KHUGEPAGED_H #define _LINUX_KHUGEPAGED_H #include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */ #ifdef CONFIG_TRANSPARENT_HUGEPAGE extern struct attribute_group khugepaged_attr_group; extern int khugepaged_init(void); extern void khugepaged_destroy(void); extern int start_stop_khugepaged(void); extern void __khugepaged_enter(struct mm_struct *mm); extern void __khugepaged_exit(struct mm_struct *mm); extern void khugepaged_enter_vma(struct vm_area_struct *vma, unsigned long vm_flags); extern void khugepaged_min_free_kbytes_update(void); extern bool current_is_khugepaged(void); #ifdef CONFIG_SHMEM extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, bool install_pmd); #else static inline int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, bool install_pmd) { return 0; } #endif static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) { if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags)) __khugepaged_enter(mm); } static inline void khugepaged_exit(struct mm_struct *mm) { if (test_bit(MMF_VM_HUGEPAGE, &mm->flags)) __khugepaged_exit(mm); } #else /* CONFIG_TRANSPARENT_HUGEPAGE */ static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm) { } static inline void khugepaged_exit(struct mm_struct *mm) { } static inline void khugepaged_enter_vma(struct vm_area_struct *vma, unsigned long vm_flags) { } static inline int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, bool install_pmd) { return 0; } static inline void khugepaged_min_free_kbytes_update(void) { } static inline bool current_is_khugepaged(void) { return false; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif /* _LINUX_KHUGEPAGED_H */