blob: b4bf4d73f406803a9dc09b9d9f11136a55de422c [file] [log] [blame]
From 85ba0b542eecd8a3533d0649cc5857da875f5798 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Date: Wed, 3 Jul 2019 15:46:08 -0400
Subject: [PATCH] ftrace/selftest: Test if set_event/ftrace_pid exists before
writing
commit 6e55f320f00e4db7144a4906dd8ac53701891e31 upstream.
While testing on a very old kernel (3.5), the tests failed because the write
to set_event_pid in the setup code, did not exist. The tests themselves
could pass, but the setup failed causing an error.
Other files test for existance before writing to them. Do the same for
set_event_pid and set_ftrace_pid.
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/tools/testing/selftests/ftrace/test.d/functions b/tools/testing/selftests/ftrace/test.d/functions
index 779ec11f61bd..1d96c5f7e402 100644
--- a/tools/testing/selftests/ftrace/test.d/functions
+++ b/tools/testing/selftests/ftrace/test.d/functions
@@ -91,8 +91,8 @@ initialize_ftrace() { # Reset ftrace to initial-state
reset_events_filter
reset_ftrace_filter
disable_events
- echo > set_event_pid # event tracer is always on
- echo > set_ftrace_pid
+ [ -f set_event_pid ] && echo > set_event_pid
+ [ -f set_ftrace_pid ] && echo > set_ftrace_pid
[ -f set_ftrace_filter ] && echo | tee set_ftrace_*
[ -f set_graph_function ] && echo | tee set_graph_*
[ -f stack_trace_filter ] && echo > stack_trace_filter
--
2.7.4