[PATCH 22/24] selftests: memory-hotplug: return Kselftest Skip code for skipped tests

[Shuah Khan (Samsung OSG)]

When memory-hotplug test is skipped because of unmet dependencies and/or
unsupported configuration, it returns non-zero value hich is treated as a
fail by the Kselftest framework. This leads to false negative result even
when the test could not be run.

Change it to return kselftest skip code when a test gets skipped to
clearly report that the test could not be run.

Kselftest framework SKIP code is 4 and the framework prints appropriate
messages to indicate that the test is skipped.

Signed-off-by: Shuah Khan (Samsung OSG) <sh...@kernel.org>
---
 tools/testing/selftests/memory-hotplug/mem-on-off-test.sh | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh 
b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
index ff4991704d07..b37585e6aa38 100755
--- a/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
+++ b/tools/testing/selftests/memory-hotplug/mem-on-off-test.sh
@@ -3,30 +3,33 @@
 
 SYSFS=
 
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
 prerequisite()
 {
        msg="skip all tests:"
 
        if [ $UID != 0 ]; then
                echo $msg must be run as root >&2
-               exit 0
+               exit $ksft_skip
        fi
 
        SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
 
        if [ ! -d "$SYSFS" ]; then
                echo $msg sysfs is not mounted >&2
-               exit 0
+               exit $ksft_skip
        fi
 
        if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
                echo $msg memory hotplug is not supported >&2
-               exit 0
+               exit $ksft_skip
        fi
 
        if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
                echo $msg no hot-pluggable memory >&2
-               exit 0
+               exit $ksft_skip
        fi
 }
 
-- 
2.14.1