tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP
authorSteven Rostedt (VMware) <rostedt@goodmis.org>
Mon, 13 Feb 2017 17:11:44 +0000 (12:11 -0500)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Mon, 13 Feb 2017 20:22:32 +0000 (17:22 -0300)
commit14e4d7e0abfdefabea2b8796c5a8b2b9c77b5326
tree67534e032e643bc2a42d82e7f7645ce8d1bac8a8
parentd7dd112ea5cacf91ae72c0714c3b911eb6016fea
tools lib traceevent: Initialize lenght on OLD_RING_BUFFER_TYPE_TIME_STAMP

A undefined value was being used for the OLD_RING_BUFFER_TYPE_TIME_STAMP
case entry, as the 'length' variable was not being initialized, fix it.

Caught by the reporter when building tools/perf/ using clang, which emmitted
this warning:

  kbuffer-parse.c:312:7: warning: variable 'length' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
          case OLD_RINGBUF_TYPE_TIME_EXTEND:
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
  kbuffer-parse.c:339:29: note: uninitialized use occurs here
          kbuf->next = kbuf->index + length;
                                   ^~~~~~
  kbuffer-parse.c:297:21: note: initialize the variable 'length' to silence this warning
          unsigned int length;
                             ^
                              = 0

Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170213121418.47f279e8@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/lib/traceevent/kbuffer-parse.c