Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / asm-generic / mutex-null.h

diff --git a/kernel/include/asm-generic/mutex-null.h b/kernel/include/asm-generic/mutex-null.h
new file mode 100644 (file)
index 0000000..61069ed
--- /dev/null
+++ b/kernel/include/asm-generic/mutex-null.h
@@ -0,0 +1,19 @@
+/*
+ * include/asm-generic/mutex-null.h
+ *
+ * Generic implementation of the mutex fastpath, based on NOP :-)
+ *
+ * This is used by the mutex-debugging infrastructure, but it can also
+ * be used by architectures that (for whatever reason) want to use the
+ * spinlock based slowpath.
+ */
+#ifndef _ASM_GENERIC_MUTEX_NULL_H
+#define _ASM_GENERIC_MUTEX_NULL_H
+
+#define __mutex_fastpath_lock(count, fail_fn)          fail_fn(count)
+#define __mutex_fastpath_lock_retval(count)            (-1)
+#define __mutex_fastpath_unlock(count, fail_fn)                fail_fn(count)
+#define __mutex_fastpath_trylock(count, fail_fn)       fail_fn(count)
+#define __mutex_slowpath_needs_to_unlock()             1
+
+#endif