os/cyan_collection: add pragma once

Signed-off-by: Samuel Just <sjust@redhat.com>

diff --git a/src/crimson/os/cyan_collection.h b/src/crimson/os/cyan_collection.h
index 7d97df7de7660aef3629ce46e02abbabdf9b386f..ae330220d558d42c093ee70b454a5a1d648f1dc8 100644 (file)
--- a/src/crimson/os/cyan_collection.h
+++ b/src/crimson/os/cyan_collection.h
@@ -1,6 +1,8 @@
 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
 // vim: ts=8 sw=2 smarttab
 
+#pragma once
+
 #include <string>
 #include <unordered_map>
 #include <boost/intrusive_ptr.hpp>