--- /dev/null
+#ifndef CEPH_PAGE_H
+#define CEPH_PAGE_H
+
+namespace ceph {
+ // these are in common/page.cc
+ extern unsigned _page_size;
+ extern unsigned long _page_mask;
+ extern unsigned _page_shift;
+}
+
+#endif
+
+
+#define CEPH_PAGE_SIZE ceph::_page_size
+#define CEPH_PAGE_MASK ceph::_page_mask
+#define CEPH_PAGE_SHIFT ceph::_page_shift
+
+