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-rw-r--r--tools/testing/selftests/ftrace/test.d/functions6
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index 5d4550591ff9..61a3c7e2634d 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -1,3 +1,9 @@
+check_filter_file() { # check filter file introduced by dynamic ftrace
+ if [ ! -f "$1" ]; then
+ echo "$1 not found? Is dynamic ftrace not set?"
+ exit_unsupported
+ fi
+}
clear_trace() { # reset trace output
echo > trace