[PATCH v4 0/6] trace-cmd reset fixes

[Tzvetomir Stoyanov <tstoyanov@vmware.com>]

[
 V4 changes:
   - An extra patch was inluded in v3 (not realeted to trace-cmd reset fixes), by mistake.
 V3 changes:
   - Refactored reset_max_latency() and reset_max_latency_instance(),
     as Steven Rostedt suggested.
 V2 changes:
   - Fixed subjects of the patches.
   - Refactored add_event_pid() and reset_event_pid(), 
     as Steven Rostedt suggested.
]

This patch series fixes "trace-cmd reset" command to 
restore default values of various ftrace configurations:
tracng_on, trace_clock, set_event_pid and tracing_max_latency.
It also fixes a segfault when the command is executed with 
"-a -d" options.

Tzvetomir Stoyanov (6):
  trace-cmd: Fix "trace-cmd reset" command to restore "tracng_on"
  trace-cmd: Fix "trace-cmd reset -a -d" segfault
  trace-cmd: Fix "trace-cmd reset" command to restore default clock
  trace-cmd: Reafctored add_event_pid()to utilize write_instance_file()
  trace-cmd: Fix "trace-cmd reset" command to restore the default value
    of set_event_pid
  trace-cmd: Reafctored reset_max_latency() to utilize
    write_instance_file()

 tracecmd/trace-record.c | 137 ++++++++++++++++++++++------------------
 1 file changed, 75 insertions(+), 62 deletions(-)

-- 
2.20.1