#define cfs_page_pin(page) do {} while (0)
#define cfs_page_unpin(page) do {} while (0)
+#define inc_zone_page_state(page, state) do {} while (0)
+#define dec_zone_page_state(page, state) do {} while (0)
+
/*
* Memory allocator
* Inline function, so utils can use them without linking of libcfs