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 <keescook@chromium.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index cfe121353eec3cd5608e43d1c98144591aceae37..4b4957b8df4e879a0d19098fdacce49658fce24a 100644 (file)
--- 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
new file mode 100644 (file)
index 0000000..47147b9
--- /dev/null
+++ 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
new file mode 100644 (file)
index 0000000..4fdc70f
--- /dev/null
+++ 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