v4.19.13 snapshot.
diff --git a/tools/testing/selftests/lib/Makefile b/tools/testing/selftests/lib/Makefile
new file mode 100644
index 0000000..70d5711
--- /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 bitmap.sh prime_numbers.sh
+
+include ../lib.mk
diff --git a/tools/testing/selftests/lib/bitmap.sh b/tools/testing/selftests/lib/bitmap.sh
new file mode 100755
index 0000000..5a90006
--- /dev/null
+++ b/tools/testing/selftests/lib/bitmap.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+# Runs bitmap infrastructure tests using test_bitmap kernel module
+if ! /sbin/modprobe -q -n test_bitmap; then
+ echo "bitmap: module test_bitmap is not found [SKIP]"
+ exit $ksft_skip
+fi
+
+if /sbin/modprobe -q test_bitmap; then
+ /sbin/modprobe -q -r test_bitmap
+ echo "bitmap: ok"
+else
+ echo "bitmap: [FAIL]"
+ exit 1
+fi
diff --git a/tools/testing/selftests/lib/config b/tools/testing/selftests/lib/config
new file mode 100644
index 0000000..126933b
--- /dev/null
+++ b/tools/testing/selftests/lib/config
@@ -0,0 +1,3 @@
+CONFIG_TEST_PRINTF=m
+CONFIG_TEST_BITMAP=m
+CONFIG_PRIME_NUMBERS=m
diff --git a/tools/testing/selftests/lib/prime_numbers.sh b/tools/testing/selftests/lib/prime_numbers.sh
new file mode 100755
index 0000000..78e7483
--- /dev/null
+++ b/tools/testing/selftests/lib/prime_numbers.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Checks fast/slow prime_number generation for inconsistencies
+
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
+if ! /sbin/modprobe -q -n prime_numbers; then
+ echo "prime_numbers: module prime_numbers is not found [SKIP]"
+ exit $ksft_skip
+fi
+
+if /sbin/modprobe -q prime_numbers selftest=65536; then
+ /sbin/modprobe -q -r prime_numbers
+ echo "prime_numbers: ok"
+else
+ echo "prime_numbers: [FAIL]"
+ exit 1
+fi
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