v4.19.13 snapshot.
diff --git a/tools/include/linux/proc_fs.h b/tools/include/linux/proc_fs.h
new file mode 100644
index 0000000..8b3b03b
--- /dev/null
+++ b/tools/include/linux/proc_fs.h
@@ -0,0 +1,4 @@
+#ifndef _TOOLS_INCLUDE_LINUX_PROC_FS_H
+#define _TOOLS_INCLUDE_LINUX_PROC_FS_H
+
+#endif /* _TOOLS_INCLUDE_LINUX_PROC_FS_H */