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-rw-r--r--include/linux/mm_inline.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 47762ca695a5..49cc68af01f8 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -38,3 +38,25 @@ del_page_from_lru(struct zone *zone, struct page *page)
zone->nr_inactive--;
}
}
+
+/*
+ * Isolate one page from the LRU lists.
+ *
+ * - zone->lru_lock must be held
+ */
+static inline int __isolate_lru_page(struct page *page)
+{
+ if (unlikely(!TestClearPageLRU(page)))
+ return 0;
+
+ if (get_page_testone(page)) {
+ /*
+ * It is being freed elsewhere
+ */
+ __put_page(page);
+ SetPageLRU(page);
+ return -ENOENT;
+ }
+
+ return 1;
+}