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-rw-r--r--kernel/tools/arch/xtensa/include/asm/barrier.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/tools/arch/xtensa/include/asm/barrier.h b/kernel/tools/arch/xtensa/include/asm/barrier.h
new file mode 100644
index 000000000..583800bd7
--- /dev/null
+++ b/kernel/tools/arch/xtensa/include/asm/barrier.h
@@ -0,0 +1,18 @@
+/*
+ * Copied from the kernel sources to tools/:
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001 - 2012 Tensilica Inc.
+ */
+
+#ifndef _TOOLS_LINUX_XTENSA_SYSTEM_H
+#define _TOOLS_LINUX_XTENSA_SYSTEM_H
+
+#define mb() ({ __asm__ __volatile__("memw" : : : "memory"); })
+#define rmb() barrier()
+#define wmb() mb()
+
+#endif /* _TOOLS_LINUX_XTENSA_SYSTEM_H */