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-rw-r--r--mm/internal.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 4e8e78b978b5..3db17b2a1ac6 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -39,8 +39,15 @@ static inline void __put_page(struct page *page)
atomic_dec(&page->_count);
}
+/*
+ * in mm/vmscan.c:
+ */
extern int isolate_lru_page(struct page *page);
+extern void putback_lru_page(struct page *page);
+/*
+ * in mm/page_alloc.c
+ */
extern void __free_pages_bootmem(struct page *page, unsigned int order);
/*
@@ -54,6 +61,25 @@ static inline unsigned long page_order(struct page *page)
return page_private(page);
}
+#ifdef CONFIG_UNEVICTABLE_LRU
+/*
+ * unevictable_migrate_page() called only from migrate_page_copy() to
+ * migrate unevictable flag to new page.
+ * Note that the old page has been isolated from the LRU lists at this
+ * point so we don't need to worry about LRU statistics.
+ */
+static inline void unevictable_migrate_page(struct page *new, struct page *old)
+{
+ if (TestClearPageUnevictable(old))
+ SetPageUnevictable(new);
+}
+#else
+static inline void unevictable_migrate_page(struct page *new, struct page *old)
+{
+}
+#endif
+
+
/*
* FLATMEM and DISCONTIGMEM configurations use alloc_bootmem_node,
* so all functions starting at paging_init should be marked __init
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