aboutsummaryrefslogtreecommitdiff
path: root/include/asm-x86/rwlock_64.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/rwlock_64.h')
-rw-r--r--include/asm-x86/rwlock_64.h26
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 00000000000..72aeebed920
--- /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