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-rw-r--r--include/xen/balloon.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index 8906361bb50c..4914b93a23f2 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/******************************************************************************
* Xen balloon functionality
*/