malloc: add SPDX license identifiers

The original code is in the public domain. Licenses/README states that the
general license for U-Boot is GPL 2.0+. So we can mark the malloc code as
GPL 2.0+ too.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/common/dlmalloc.c b/common/dlmalloc.c
index cf0270a..11729e8 100644
--- a/common/dlmalloc.c
+++ b/common/dlmalloc.c
@@ -1,3 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * This code is based on a version (aka dlmalloc) of malloc/free/realloc written
+ * by Doug Lea and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/-
+ *
+ * The original code is available at http://gee.cs.oswego.edu/pub/misc/
+ * as file malloc-2.6.6.c.
+ */
+
 #include <common.h>
 #include <log.h>
 #include <asm/global_data.h>