diff --git a/BLD/build/HEADERS/CUR-92-vmkdrivers-asm-x64/vmkernel64/release/asm/rwlock.h b/BLD/build/HEADERS/CUR-92-vmkdrivers-asm-x64/vmkernel64/release/asm/rwlock.h
new file mode 100644
index 0000000000000000000000000000000000000000..9b01e04923182f02338a0522063b2439fc994dc7
--- /dev/null
+++ b/BLD/build/HEADERS/CUR-92-vmkdrivers-asm-x64/vmkernel64/release/asm/rwlock.h
@@ -0,0 +1,81 @@
+/*
+ * Portions Copyright 2008 VMware, Inc.
+ */
+/* include/asm-x86_64/rwlock.h
+ *
+ *	Helpers used by both rw spinlocks and rw semaphores.
+ *
+ *	Based in part on code from semaphore.h and
+ *	spinlock.h Copyright 1996 Linus Torvalds.
+ *
+ *	Copyright 1999 Red Hat, Inc.
+ *	Copyright 2001,2002 SuSE labs 
+ *
+ *	Written by Benjamin LaHaise.
+ *
+ *	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.
+ */
+#ifndef _ASM_X86_64_RWLOCK_H
+#define _ASM_X86_64_RWLOCK_H
+
+#define RW_LOCK_BIAS		 0x01000000
+#define RW_LOCK_BIAS_STR	 "0x01000000"
+
+#if defined(__VMKLNX__)
+
+#define __build_read_lock(rw)   \
+	asm volatile(LOCK_PREFIX "subl $1,(%0)\n\t" \
+                     "js 2f\n" \
+                     "cmpb $0, vmk_AtomicUseFence(%%rip)\n" \
+                     "jne 4f\n" \
+                     "1:\n" \
+                     LOCK_SECTION_START("") \
+                     "2:\tcmpb $0, vmk_AtomicUseFence(%%rip)\n" \
+                     "je 3f\n" \
+                     "lfence\n" \
+                     "3:\tcall __read_lock_failed\n\t" \
+                     "jmp 1b\n" \
+                     "4:\tlfence\n" \
+                     "jmp 1b\n" \
+                     LOCK_SECTION_END \
+		     ::"D" (rw), "i" (RW_LOCK_BIAS) : "memory")
+
+#define __build_write_lock(rw) \
+	asm volatile(LOCK_PREFIX "subl %1,(%0)\n\t" \
+		     "jnz 2f\n" \
+                     "cmpb $0, vmk_AtomicUseFence(%%rip)\n" \
+                     "jne 4f\n" \
+                     "1:\n" \
+                     LOCK_SECTION_START("") \
+                     "2:\tcmpb $0, vmk_AtomicUseFence(%%rip)\n" \
+                     "je 3f\n" \
+                     "lfence\n" \
+                     "3:\tcall __write_lock_failed\n\t" \
+                     "jmp 1b\n" \
+                     "4:\tlfence\n" \
+                     "jmp 1b\n" \
+                     LOCK_SECTION_END \
+		     ::"D" (rw), "i" (RW_LOCK_BIAS) : "memory")
+
+#else /* !defined(__VMKLNX__) */
+
+#define __build_read_lock(rw)   \
+	asm volatile(LOCK_PREFIX "subl $1,(%0)\n\t" \
+		     "jns 1f\n" \
+		     "call __read_lock_failed\n" \
+		     "1:\n" \
+		     ::"D" (rw), "i" (RW_LOCK_BIAS) : "memory")
+
+#define __build_write_lock(rw) \
+	asm volatile(LOCK_PREFIX "subl %1,(%0)\n\t" \
+		     "jz 1f\n" \
+		     "\tcall __write_lock_failed\n\t" \
+		     "1:\n" \
+		     ::"D" (rw), "i" (RW_LOCK_BIAS) : "memory")
+
+#endif /* defined(__VMKLNX__) */
+
+#endif