diff --git a/BLD/build/HEADERS/92-vmkdrivers-asm-x64/vmkernel64/release/asm/mm_track.h b/BLD/build/HEADERS/92-vmkdrivers-asm-x64/vmkernel64/release/asm/mm_track.h
new file mode 100644
index 0000000000000000000000000000000000000000..7e26470eb4fad138d615c90f5df9e7cf8d7c975c
--- /dev/null
+++ b/BLD/build/HEADERS/92-vmkdrivers-asm-x64/vmkernel64/release/asm/mm_track.h
@@ -0,0 +1,98 @@
+/*
+ * Routines and structures for building a bitmap of
+ * dirty pages in a live system.  For use in memory mirroring
+ * or migration applications.
+ *
+ * Copyright (C) 2006 Stratus Technologies Bermuda Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#ifndef __X86_64_MMTRACK_H__
+#define __X86_64_MMTRACK_H__
+
+#ifndef CONFIG_TRACK_DIRTY_PAGES
+
+static inline void mm_track_pte(pte_t *ptep)	{}
+static inline void mm_track_pmd(pmd_t *pmdp)	{}
+static inline void mm_track_pud(pud_t *pudp)	{}
+static inline void mm_track_pgd(pgd_t *pgdp) 	{}
+static inline void mm_track_phys(void *physp)	{}
+
+#else
+
+#include <asm/page.h>
+#include <asm/atomic.h>
+ /*
+  * For memory-tracking purposes, if active is true (non-zero), the other
+  * elements of the structure are available for use.  Each time mm_track_pte
+  * is called, it increments count and sets a bit in the bitvector table.
+  * Each bit in the bitvector represents a physical page in memory.
+  *
+  * This is declared in arch/x86_64/mm/track.c.
+  *
+  * The in_use element is used in the code which drives the memory tracking
+  * environment.  When tracking is complete, the vector may be freed, but 
+  * only after the active flag is set to zero and the in_use count goes to
+  * zero.
+  *
+  * The count element indicates how many pages have been stored in the
+  * bitvector.  This is an optimization to avoid counting the bits in the
+  * vector between harvest operations.
+  */
+struct mm_tracker {
+	int active;		// non-zero if this structure in use
+	atomic_t count;		// number of pages tracked by mm_track()
+	unsigned long * vector;	// bit vector of modified pages
+	unsigned long bitcnt;	// number of bits in vector
+};
+extern struct mm_tracker mm_tracking_struct;
+
+extern void do_mm_track_pte(void *);
+extern void do_mm_track_pmd(void *);
+extern void do_mm_track_pud(void *);
+extern void do_mm_track_pgd(void *);
+extern void do_mm_track_phys(void *);
+
+/*
+ * The mm_track routine is needed by macros in pgtable.h
+ */
+static __inline__ void mm_track_pte(pte_t *ptep)
+{
+	if (unlikely(mm_tracking_struct.active))
+		do_mm_track_pte(ptep);
+}
+static __inline__ void mm_track_pmd(pmd_t *pmdp)
+{
+	if (unlikely(mm_tracking_struct.active))
+		do_mm_track_pmd(pmdp);
+}
+static __inline__ void mm_track_pud(pud_t *pudp)
+{
+	if (unlikely(mm_tracking_struct.active))
+		do_mm_track_pud(pudp);
+}
+static __inline__ void mm_track_pgd(pgd_t *pgdp)
+{
+	if (unlikely(mm_tracking_struct.active))
+		do_mm_track_pgd(pgdp);
+}
+static __inline__ void mm_track_phys(void *physp)
+{
+	if (unlikely(mm_tracking_struct.active))
+		do_mm_track_phys(physp);
+}
+#endif /* CONFIG_TRACK_DIRTY_PAGES */
+
+#endif /* __X86_64_MMTRACK_H__ */