diff -Naur linux-2.6.28/mm/tmem.c linux-2.6.28-tmem/mm/tmem.c
--- linux-2.6.28/mm/tmem.c	1969-12-31 17:00:00.000000000 -0700
+++ linux-2.6.28-tmem/mm/tmem.c	2009-01-08 13:34:50.000000000 -0700
@@ -0,0 +1,47 @@
+/*
+ * Transcendent memory
+ *
+ * Copyright (C) 2008 Dan Magenheimer, Oracle Corp.
+ */
+
+#include <linux/mm.h>
+#include <asm/xen/hypervisor.h> /* for xen_pv_domain */
+#include "tmem.h"
+
+#ifdef CONFIG_XEN
+extern int xen_tmem_op(uint32_t tmem_cmd, uint32_t tmem_pool, uint64_t object,
+	uint32_t index, unsigned long gmfn, uint32_t tmem_offset,
+	uint32_t pfn_offset, uint32_t len );
+extern int xen_tmem_new_pool(uint32_t tmem_cmd, uint64_t uuid_lo,
+	uint64_t uuid_hi, uint32_t flags);
+
+int tmem_op(uint32_t tmem_cmd, uint32_t tmem_pool, uint64_t object,
+	uint32_t index, unsigned long gmfn, uint32_t tmem_offset,
+	uint32_t pfn_offset, uint32_t len )
+{
+	if (!xen_pv_domain()) return 0;
+	return xen_tmem_op(tmem_cmd,tmem_pool,object,index,gmfn,
+		tmem_offset,pfn_offset,len);
+}
+
+int tmem_new_pool(uint64_t uuid_lo, uint64_t uuid_hi, uint32_t flags)
+{
+//printk("tmem_new_pool(%llu,%llu,%d) called...",uuid_lo,uuid_hi,flags);
+	if (!xen_pv_domain()) return 0;
+	flags |= (PAGE_SHIFT - 12) << TMEM_POOL_PAGESIZE_SHIFT;
+	return xen_tmem_new_pool(TMEM_NEW_POOL, uuid_lo, uuid_hi, flags);
+//printk("returns %d\n",ret);
+}
+#else
+int tmem_op(uint32_t tmem_cmd, uint32_t tmem_pool, uint64_t object,
+	uint32_t index, unsigned long gmfn, uint32_t tmem_offset,
+	uint32_t pfn_offset, uint32_t len );
+{
+	return 0;
+}
+
+int tmem_new_pool(uint64_t uuid_lo, uint64_t uuid_hi, uint32_t flags)
+{
+	return 0;
+}
+#endif
diff -Naur linux-2.6.28/mm/tmem.h linux-2.6.28-tmem/mm/tmem.h
--- linux-2.6.28/mm/tmem.h	1969-12-31 17:00:00.000000000 -0700
+++ linux-2.6.28-tmem/mm/tmem.h	2009-01-05 16:57:43.000000000 -0700
@@ -0,0 +1,48 @@
+/*
+ * linux/mm/tmem.h
+ *
+ * Copyright (C) 2008 Dan Magenheimer, Oracle Corp.
+ */
+
+extern int tmem_op(uint32_t tmem_cmd, uint32_t pool_id, uint64_t object,
+	uint32_t index, unsigned long gmfn, uint32_t tmem_offset,
+	uint32_t pfn_offset, uint32_t len );
+extern int tmem_new_pool(uint64_t uuid_lo,uint64_t uuid_hi,uint32_t flags);
+
+#define TMEM_CONTROL               0
+#define TMEM_NEW_POOL              1
+#define TMEM_DESTROY_POOL          2
+#define TMEM_NEW_PAGE              3
+#define TMEM_PUT_PAGE              4
+#define TMEM_GET_PAGE              5
+#define TMEM_FLUSH_PAGE            6
+#define TMEM_FLUSH_OBJECT          7
+#define TMEM_READ                  8
+#define TMEM_WRITE                 9
+#define TMEM_XCHG                 10
+
+#define TMEM_POOL_PERSIST          1
+#define TMEM_POOL_SHARED           2
+
+#define TMEM_POOL_PAGESIZE_SHIFT   4
+
+#ifndef CONFIG_XEN
+struct tmem_op {
+    uint32_t cmd;
+    int32_t pool_id; /* private > 0; shared < 0; 0 is invalid */
+    union {
+        struct {  /* for cmd == TMEM_NEW_POOL */
+            uint64_t uuid[2];
+            uint32_t flags;
+        };
+        struct {
+            uint64_t object;
+            uint32_t index;
+            uint32_t tmem_offset;
+            uint32_t pfn_offset;
+            uint32_t len;
+            unsigned long pfn;  /* page frame */
+        };
+    };
+};
+#endif