1 files changed, 18 insertions, 54 deletions

diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h
index c941b7377321..b8d69cfbb58b 100644
--- a/include/linux/khugepaged.h
+++ b/include/linux/khugepaged.h
@@ -2,48 +2,26 @@
 #ifndef _LINUX_KHUGEPAGED_H
 #define _LINUX_KHUGEPAGED_H
 
-#include <linux/sched/coredump.h> /* MMF_VM_HUGEPAGE */
-
-
+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 int __khugepaged_enter(struct mm_struct *mm);
+extern void __khugepaged_enter(struct mm_struct *mm);
 extern void __khugepaged_exit(struct mm_struct *mm);
-extern int khugepaged_enter_vma_merge(struct vm_area_struct *vma,
-				      unsigned long vm_flags);
+extern void khugepaged_enter_vma(struct vm_area_struct *vma,
+				 unsigned long vm_flags);
 extern void khugepaged_min_free_kbytes_update(void);
-#ifdef CONFIG_SHMEM
-extern void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr);
-#else
-static inline void collapse_pte_mapped_thp(struct mm_struct *mm,
-					   unsigned long addr)
-{
-}
-#endif
+extern bool current_is_khugepaged(void);
+extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,
+				   bool install_pmd);
 
-#define khugepaged_enabled()					       \
-	(transparent_hugepage_flags &				       \
-	 ((1<<TRANSPARENT_HUGEPAGE_FLAG) |		       \
-	  (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)))
-#define khugepaged_always()				\
-	(transparent_hugepage_flags &			\
-	 (1<<TRANSPARENT_HUGEPAGE_FLAG))
-#define khugepaged_req_madv()					\
-	(transparent_hugepage_flags &				\
-	 (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG))
-#define khugepaged_defrag()					\
-	(transparent_hugepage_flags &				\
-	 (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG))
-
-static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
+static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
 {
 	if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags))
-		return __khugepaged_enter(mm);
-	return 0;
+		__khugepaged_enter(mm);
 }
 
 static inline void khugepaged_exit(struct mm_struct *mm)
@@ -51,44 +29,30 @@ static inline void khugepaged_exit(struct mm_struct *mm)
 	if (test_bit(MMF_VM_HUGEPAGE, &mm->flags))
 		__khugepaged_exit(mm);
 }
-
-static inline int khugepaged_enter(struct vm_area_struct *vma,
-				   unsigned long vm_flags)
-{
-	if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags))
-		if ((khugepaged_always() ||
-		     (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) &&
-		    !(vm_flags & VM_NOHUGEPAGE) &&
-		    !test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
-			if (__khugepaged_enter(vma->vm_mm))
-				return -ENOMEM;
-	return 0;
-}
 #else /* CONFIG_TRANSPARENT_HUGEPAGE */
-static inline int khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
+static inline void khugepaged_fork(struct mm_struct *mm, struct mm_struct *oldmm)
 {
-	return 0;
 }
 static inline void khugepaged_exit(struct mm_struct *mm)
 {
 }
-static inline int khugepaged_enter(struct vm_area_struct *vma,
-				   unsigned long vm_flags)
+static inline void khugepaged_enter_vma(struct vm_area_struct *vma,
+					unsigned long vm_flags)
 {
-	return 0;
 }
-static inline int khugepaged_enter_vma_merge(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 collapse_pte_mapped_thp(struct mm_struct *mm,
-					   unsigned long addr)
+
+static inline void khugepaged_min_free_kbytes_update(void)
 {
 }
 
-static inline void khugepaged_min_free_kbytes_update(void)
+static inline bool current_is_khugepaged(void)
 {
+	return false;
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */