selftests: run lib/test_printf module

This runs the lib/test_printf module to make sure printf is operating sanely. Signed-off-by: Kees Cook <[email protected]> Cc: Rasmus Villemoes <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Andy Shevchenko <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
chewitt · Nov 7, 2015 · 317dc34 · 317dc34
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diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
@@ -6,6 +6,7 @@ TARGETS += firmware
 TARGETS += ftrace
 TARGETS += futex
 TARGETS += kcmp
+TARGETS += lib
 TARGETS += membarrier
 TARGETS += memfd
 TARGETS += memory-hotplug

diff --git a/tools/testing/selftests/lib/Makefile b/tools/testing/selftests/lib/Makefile
@@ -0,0 +1,8 @@
+# Makefile for lib/ function selftests
+
+# No binaries, but make sure arg-less "make" doesn't trigger "run_tests"
+all:
+
+TEST_PROGS := printf.sh
+
+include ../lib.mk
diff --git a/tools/testing/selftests/lib/printf.sh b/tools/testing/selftests/lib/printf.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+# Runs printf infrastructure using test_printf kernel module
+
+if /sbin/modprobe -q test_printf; then
+	/sbin/modprobe -q -r test_printf
+	echo "printf: ok"
+else
+	echo "printf: [FAIL]"
+	exit 1
+fi