+/*
+ * Note: PG_tail is an alias of another page flag. The result of PageTail()
+ * is only valid if PageCompound(page) is true.
+ */
+#define PageTail(page) test_bit(PG_tail, &(page)->flags)
+#define __SetPageTail(page) __set_bit(PG_tail, &(page)->flags)
+#define __ClearPageTail(page) __clear_bit(PG_tail, &(page)->flags)
+