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Diffstat (limited to 'include/linux/ksm.h')
-rw-r--r--include/linux/ksm.h37
1 files changed, 35 insertions, 2 deletions
diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 7e232ba59b86..7a9b76fb6c3f 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -18,13 +18,26 @@
#ifdef CONFIG_KSM
int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
unsigned long end, int advice, unsigned long *vm_flags);
+
+void ksm_add_vma(struct vm_area_struct *vma);
+int ksm_enable_merge_any(struct mm_struct *mm);
+
int __ksm_enter(struct mm_struct *mm);
void __ksm_exit(struct mm_struct *mm);
static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm)
{
- if (test_bit(MMF_VM_MERGEABLE, &oldmm->flags))
- return __ksm_enter(mm);
+ int ret;
+
+ if (test_bit(MMF_VM_MERGEABLE, &oldmm->flags)) {
+ ret = __ksm_enter(mm);
+ if (ret)
+ return ret;
+ }
+
+ if (test_bit(MMF_VM_MERGE_ANY, &oldmm->flags))
+ set_bit(MMF_VM_MERGE_ANY, &mm->flags);
+
return 0;
}
@@ -51,8 +64,21 @@ struct page *ksm_might_need_to_copy(struct page *page,
void rmap_walk_ksm(struct folio *folio, struct rmap_walk_control *rwc);
void folio_migrate_ksm(struct folio *newfolio, struct folio *folio);
+#ifdef CONFIG_MEMORY_FAILURE
+void collect_procs_ksm(struct page *page, struct list_head *to_kill,
+ int force_early);
+#endif
+
+#ifdef CONFIG_PROC_FS
+long ksm_process_profit(struct mm_struct *);
+#endif /* CONFIG_PROC_FS */
+
#else /* !CONFIG_KSM */
+static inline void ksm_add_vma(struct vm_area_struct *vma)
+{
+}
+
static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm)
{
return 0;
@@ -62,6 +88,13 @@ static inline void ksm_exit(struct mm_struct *mm)
{
}
+#ifdef CONFIG_MEMORY_FAILURE
+static inline void collect_procs_ksm(struct page *page,
+ struct list_head *to_kill, int force_early)
+{
+}
+#endif
+
#ifdef CONFIG_MMU
static inline int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
unsigned long end, int advice, unsigned long *vm_flags)