1 files changed, 76 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/rcupdate.h b/sys/compat/linuxkpi/common/include/linux/rcupdate.h
new file mode 100644
index 000000000000..f8e2b04bc3de
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/linux/rcupdate.h
@@ -0,0 +1,76 @@
+/*-
+ * Copyright (c) 2016 Mellanox Technologies, Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef	_LINUX_RCUPDATE_H_
+#define	_LINUX_RCUPDATE_H_
+
+#include <sys/param.h>
+#include <sys/lock.h>
+#include <sys/sx.h>
+
+extern struct sx linux_global_rcu_lock;
+
+struct rcu_head {
+};
+
+typedef void (*rcu_callback_t)(struct rcu_head *);
+
+static inline void
+call_rcu(struct rcu_head *ptr, rcu_callback_t func)
+{
+	sx_xlock(&linux_global_rcu_lock);
+	func(ptr);
+	sx_xunlock(&linux_global_rcu_lock);
+}
+
+static inline void
+rcu_read_lock(void)
+{
+	sx_slock(&linux_global_rcu_lock);
+}
+
+static inline void
+rcu_read_unlock(void)
+{
+	sx_sunlock(&linux_global_rcu_lock);
+}
+
+static inline void
+rcu_barrier(void)
+{
+	sx_xlock(&linux_global_rcu_lock);
+	sx_xunlock(&linux_global_rcu_lock);
+}
+
+static inline void
+synchronize_rcu(void)
+{
+	sx_xlock(&linux_global_rcu_lock);
+	sx_xunlock(&linux_global_rcu_lock);
+}
+
+#endif					/* _LINUX_RCUPDATE_H_ */