selftests/ftrace: Do not to use absolute debugfs path

Use relative path to trigger file instead of absolute debugfs path,
because if the user uses tracefs instead of debugfs, it can be
mounted at /sys/kernel/tracing.
Anyway, since the ftracetest is designed to be run at the tracing
directory, user doesn't need to use absolute path.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-action-hist-xfail.tc

@@ -21,10 +21,10 @@ grep -q "snapshot()" README || exit_unsupported # version issue
 
 echo "Test expected snapshot action failure"
 
-echo 'hist:keys=comm:onmatch(sched.sched_wakeup).snapshot()' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger && exit_fail
+echo 'hist:keys=comm:onmatch(sched.sched_wakeup).snapshot()' >> events/sched/sched_waking/trigger && exit_fail
 
 echo "Test expected save action failure"
 
-echo 'hist:keys=comm:onmatch(sched.sched_wakeup).save(comm,prio)' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger && exit_fail
+echo 'hist:keys=comm:onmatch(sched.sched_wakeup).save(comm,prio)' >> events/sched/sched_waking/trigger && exit_fail
 
 exit_xfail

tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-onchange-action-hist.tc

@@ -16,7 +16,7 @@ grep -q "onchange(var)" README || exit_unsupported # version issue
 
 echo "Test onchange action"
 
-echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio) if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
+echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio) if comm=="ping"' >> events/sched/sched_waking/trigger
 
 ping $LOCALHOST -c 3
 nice -n 1 ping $LOCALHOST -c 3

tools/testing/selftests/ftrace/test.d/trigger/inter-event/trigger-snapshot-action-hist.tc

@@ -23,9 +23,9 @@ grep -q "snapshot()" README || exit_unsupported # version issue
 
 echo "Test snapshot action"
 
-echo 1 > /sys/kernel/debug/tracing/events/sched/enable
+echo 1 > events/sched/enable
 
-echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onchange($newprio).snapshot() if comm=="ping"' >> /sys/kernel/debug/tracing/events/sched/sched_waking/trigger
+echo 'hist:keys=comm:newprio=prio:onchange($newprio).save(comm,prio):onchange($newprio).snapshot() if comm=="ping"' >> events/sched/sched_waking/trigger
 
 ping $LOCALHOST -c 3
 nice -n 1 ping $LOCALHOST -c 3