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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KHUGEPAGED_H
#define _LINUX_KHUGEPAGED_H
#include <linux/mm.h>
extern unsigned int khugepaged_max_ptes_none __read_mostly;
#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,
vm_flags_t vm_flags);
extern void khugepaged_min_free_kbytes_update(void);
extern bool current_is_khugepaged(void);
extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
bool install_pmd);
static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
{
if (mm_flags_test(MMF_VM_HUGEPAGE, oldmm))
__khugepaged_enter(mm);
}
static inline void khugepaged_exit(struct mm_struct *mm)
{
if (mm_flags_test(MMF_VM_HUGEPAGE, mm))
__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,
vm_flags_t 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 */
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