perf_query_supported 21 tools/bpf/bpftool/perf.c static int perf_query_supported; perf_query_supported 29 tools/bpf/bpftool/perf.c if (perf_query_supported) perf_query_supported 48 tools/bpf/bpftool/perf.c perf_query_supported = 1; perf_query_supported 52 tools/bpf/bpftool/perf.c perf_query_supported = 2; perf_query_supported 60 tools/bpf/bpftool/perf.c return perf_query_supported == 1;