1 files changed, 26 insertions, 0 deletions

diff --git a/include/asm-x86/rwlock_64.h b/include/asm-x86/rwlock_64.h
new file mode 100644
index 000000000000..72aeebed920b
--- /dev/null
+++ b/include/asm-x86/rwlock_64.h
@@ -0,0 +1,26 @@
+/* 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"
+
+/* Actual code is in asm/spinlock.h or in arch/x86_64/lib/rwlock.S */
+
+#endif