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-rw-r--r--mm/debug_page_ref.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/debug_page_ref.c b/mm/debug_page_ref.c
index 1aef3d562e52..f3b2c9d3ece2 100644
--- a/mm/debug_page_ref.c
+++ b/mm/debug_page_ref.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
#include <linux/mm_types.h>
#include <linux/tracepoint.h>