Extern or forward variable declaration at tools/perf/util/hist.h, line 150 References: tools/perf/builtin-diff.c, line 863 tools/perf/builtin-diff.c, line 892 tools/perf/builtin-diff.c, line 950 tools/perf/builtin-diff.c, line 956 tools/perf/builtin-diff.c, line 962 tools/perf/builtin-diff.c, line 1062 tools/perf/builtin-diff.c, line 1078 tools/perf/builtin-diff.c, line 1091 tools/perf/util/hist.c, line 1168 tools/perf/util/hist.h, line 150 tools/perf/util/hist.h, line 158 tools/perf/util/hist.h, line 234 tools/perf/util/hist.h, line 243 tools/perf/util/hist.h, line 245 tools/perf/util/hist.h, line 247 tools/perf/util/hist.h, line 249 tools/perf/util/hist.h, line 392 tools/perf/util/hist.h, line 393 tools/perf/util/hist.h, line 395 tools/perf/util/hist.h, line 398 tools/perf/util/hist.h, line 402 tools/perf/util/hist.h, line 516 tools/perf/util/hist.h, line 517 tools/perf/util/hist.h, line 518 tools/perf/util/sort.c, line 1651 tools/perf/util/sort.c, line 1667 tools/perf/util/sort.c, line 1681 tools/perf/util/sort.c, line 1957 tools/perf/util/sort.c, line 1974 tools/perf/util/sort.c, line 1997