diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 65872340e301..133be3c689af 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  file.c - part of debugfs, a tiny little debug file system
  *
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 9dca4da059b3..7c107b3b9c93 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  inode.c - part of debugfs, a tiny little debug file system
  *
diff --git a/fs/debugfs/internal.h b/fs/debugfs/internal.h
index cb1e8139c398..b9567541b737 100644
--- a/fs/debugfs/internal.h
+++ b/fs/debugfs/internal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  internal.h - declarations internal to debugfs
  *
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 9f821a43bb0d..7beab3fd2f1a 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  debugfs.h - a tiny little debug file system
  *