From 1205ffec751b7ec08482372ec6c21698db1007f5 Mon Sep 17 00:00:00 2001 From: "Steven Rostedt (VMware)" Date: Tue, 6 Feb 2018 17:15:02 -0500 Subject: [PATCH] selftests/ftrace: Have reset_ftrace_filter handle multiple instances If a probe is attached to a static function that is in multiple files with the same name, removing it by name will remove all instances: # grep jump_label_unlock set_ftrace_filter jump_label_unlock:traceoff:unlimited jump_label_unlock:traceoff:unlimited # echo '!jump_label_unlock:traceoff' >> set_ftrace_filter # grep jump_label_unlock set_ftrace_filter # But the loop in reset_ftrace_filter will try to remove multiple instances multiple times. If this happens the second time will error and cause the test to fail. At each iteration of the loop, check to see if the probe being removed still exists. Cc: Shuah Khan Signed-off-by: Steven Rostedt (VMware) --- tools/testing/selftests/ftrace/test.d/functions | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions index e7c4c7b752a25..df3dd7fe5f9b2 100644 --- a/tools/testing/selftests/ftrace/test.d/functions +++ b/tools/testing/selftests/ftrace/test.d/functions @@ -37,6 +37,9 @@ reset_ftrace_filter() { # reset all triggers in set_ftrace_filter if [ "$tr" = "" ]; then continue fi + if ! grep -q "$t" set_ftrace_filter; then + continue; + fi name=`echo $t | cut -d: -f1 | cut -d' ' -f1` if [ $tr = "enable_event" -o $tr = "disable_event" ]; then tr=`echo $t | cut -d: -f2-4` -- 2.39.5