Extern or forward variable declaration at tools/perf/util/thread-stack.h, line 20 References: tools/perf/builtin-script.c, line 858 tools/perf/builtin-script.c, line 906 tools/perf/builtin-script.c, line 952 tools/perf/builtin-script.c, line 1002 tools/perf/builtin-script.c, line 1101 tools/perf/builtin-script.c, line 1138 tools/perf/builtin-script.c, line 1317 tools/perf/builtin-script.c, line 1345 tools/perf/builtin-script.c, line 1346 tools/perf/builtin-script.c, line 1375 tools/perf/builtin-script.c, line 1376 tools/perf/builtin-script.c, line 1477 tools/perf/builtin-script.c, line 1478 tools/perf/builtin-script.c, line 1945 tools/perf/builtin-script.c, line 1946 tools/perf/builtin-script.c, line 1986 tools/perf/builtin-script.c, line 1987 tools/perf/builtin-script.c, line 2183 tools/perf/builtin-script.c, line 2184 tools/perf/builtin-script.c, line 2241 tools/perf/util/cs-etm.c, line 705 tools/perf/util/intel-pt.c, line 689 tools/perf/util/intel-pt.c, line 865 tools/perf/util/intel-pt.c, line 2886 tools/perf/util/intel-pt.c, line 2904 tools/perf/util/scripting-engines/trace-event-python.c, line 396 tools/perf/util/scripting-engines/trace-event-python.c, line 480 tools/perf/util/scripting-engines/trace-event-python.c, line 522 tools/perf/util/scripting-engines/trace-event-python.c, line 534 tools/perf/util/scripting-engines/trace-event-python.c, line 569 tools/perf/util/scripting-engines/trace-event-python.c, line 736 tools/perf/util/scripting-engines/trace-event-python.c, line 777 tools/perf/util/scripting-engines/trace-event-python.c, line 778 tools/perf/util/scripting-engines/trace-event-python.c, line 859 tools/perf/util/scripting-engines/trace-event-python.c, line 860 tools/perf/util/scripting-engines/trace-event-python.c, line 1368 tools/perf/util/scripting-engines/trace-event-python.c, line 1369 tools/perf/util/scripting-engines/trace-event-python.c, line 1405 tools/perf/util/scripting-engines/trace-event-python.c, line 1406 tools/perf/util/thread.c, line 408 tools/perf/util/thread.c, line 440