From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sandeep Patil Date: Wed, 8 Aug 2018 16:40:19 -0700 Subject: [LTP] [PATCH] tracing: ftrace_lib: check if tracing_max_latency exists. Message-ID: <20180808234019.241238-1-sspatil@google.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it This avoids unnecessary error in ftrace stress test when the kernel being tested does not have CONFIG_TRACER_MAX_TRACE defined. Signed-off-by: Sandeep Patil --- testcases/kernel/tracing/ftrace_test/ftrace_lib.sh | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/testcases/kernel/tracing/ftrace_test/ftrace_lib.sh b/testcases/kernel/tracing/ftrace_test/ftrace_lib.sh index 20cf5e760..ec4f7a557 100755 --- a/testcases/kernel/tracing/ftrace_test/ftrace_lib.sh +++ b/testcases/kernel/tracing/ftrace_test/ftrace_lib.sh @@ -100,7 +100,9 @@ restore_old_setting() echo nop > current_tracer echo 0 > events/enable - echo 0 > tracing_max_latency 2> /dev/null + if [ -e tracing_max_latency ]; then + echo 0 > tracing_max_latency 2> /dev/null + fi if [ -e tracing_cpumask ]; then echo $old_tracing_cpumask > tracing_cpumask -- 2.18.0.597.ga71716f1ad-goog