v4.19.13 snapshot.
diff --git a/tools/testing/selftests/lib/printf.sh b/tools/testing/selftests/lib/printf.sh
new file mode 100755
index 0000000..45a23e2
--- /dev/null
+++ b/tools/testing/selftests/lib/printf.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Runs printf infrastructure using test_printf kernel module
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if ! /sbin/modprobe -q -n test_printf; then
+ echo "printf: module test_printf is not found [SKIP]"
+ exit $ksft_skip
+fi
+
+if /sbin/modprobe -q test_printf; then
+ /sbin/modprobe -q -r test_printf
+ echo "printf: ok"
+else
+ echo "printf: [FAIL]"
+ exit 1
+fi