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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2019-07-03 15:46:08 -0400
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2019-07-16 15:14:48 -0400
commit6e55f320f00e4db7144a4906dd8ac53701891e31 (patch)
tree05c25a134fad86dd722bc3385842c5c59a838ba0 /tools/testing/selftests/ftrace
parentftrace/selftests: Return the skip code when tracing directory not configured in kernel (diff)
downloadwireguard-linux-6e55f320f00e4db7144a4906dd8ac53701891e31.tar.xz
wireguard-linux-6e55f320f00e4db7144a4906dd8ac53701891e31.zip
ftrace/selftest: Test if set_event/ftrace_pid exists before writing
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>
Diffstat (limited to 'tools/testing/selftests/ftrace')
-rw-r--r--tools/testing/selftests/ftrace/test.d/functions4
1 files changed, 2 insertions, 2 deletions
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