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-rw-r--r--mm/ksm.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 7d6558f3bac9..e2d2886fb1df 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -840,6 +840,17 @@ static int unmerge_ksm_pages(struct vm_area_struct *vma,
return err;
}
+static inline struct stable_node *page_stable_node(struct page *page)
+{
+ return PageKsm(page) ? page_rmapping(page) : NULL;
+}
+
+static inline void set_page_stable_node(struct page *page,
+ struct stable_node *stable_node)
+{
+ page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);
+}
+
#ifdef CONFIG_SYSFS
/*
* Only called through the sysfs control interface: