[PATCH 09/24] selftests: ftrace: return Kselftest Skip code for skipped tests

["Shuah Khan (Samsung OSG)" <shuah@kernel.org>]

When ftrace test is skipped because of unmet dependencies and/or
unsupported configuration, it returns 0 which is treated as a pass
by the Kselftest framework. This leads to false positive 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) <shuah@kernel.org>
---
 tools/testing/selftests/ftrace/ftracetest | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
index f9a9d424c980..b731c8cdcffb 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -23,6 +23,9 @@ echo "		            If <dir> is -, all logs output in console only"
 exit $1
 }
 
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
 errexit() { # message
   echo "Error: $1" 1>&2
   exit 1
@@ -30,7 +33,8 @@ errexit() { # message
 
 # Ensuring user privilege
 if [ `id -u` -ne 0 ]; then
-  errexit "this must be run by root user"
+  echo "Skipping: test must be run by root user"
+  exit $ksft_skip
 fi
 
 # Utilities
@@ -249,7 +253,7 @@ trap 'SIG_RESULT=$UNTESTED' $SIG_UNTESTED
 SIG_UNSUPPORTED=$((SIG_BASE + UNSUPPORTED))
 exit_unsupported () {
   kill -s $SIG_UNSUPPORTED $SIG_PID
-  exit 0
+  exit $ksft_skip
 }
 trap 'SIG_RESULT=$UNSUPPORTED' $SIG_UNSUPPORTED
 
-- 
2.14.1