Extern or forward variable declaration at include/linux/perf_event.h, line 517 References: arch/alpha/kernel/perf_event.c, line 808 arch/arc/kernel/perf_event.c, line 402 arch/arm/kernel/perf_event_v7.c, line 952 arch/arm/kernel/ptrace.c, line 378 arch/arm64/kernel/perf_event.c, line 692 arch/arm64/kernel/ptrace.c, line 171 arch/mips/kernel/perf_event_mipsxx.c, line 734 arch/mips/kernel/perf_event_mipsxx.c, line 1380 arch/nds32/kernel/perf_event_cpu.c, line 228 arch/powerpc/kernel/ptrace.c, line 2369 arch/powerpc/perf/core-book3s.c, line 2084 arch/powerpc/perf/core-fsl-emb.c, line 646 arch/powerpc/perf/imc-pmu.c, line 1141 arch/powerpc/perf/imc-pmu.c, line 1183 arch/s390/kernel/perf_cpum_sf.c, line 647 arch/s390/kernel/perf_cpum_sf.c, line 1014 arch/sh/kernel/ptrace_32.c, line 64 arch/x86/events/amd/ibs.c, line 572 arch/x86/events/core.c, line 1467 arch/x86/events/intel/core.c, line 2333 arch/x86/events/intel/ds.c, line 593 arch/x86/events/intel/ds.c, line 1298 arch/x86/events/intel/ds.c, line 1467 arch/x86/events/intel/ds.c, line 1685 arch/x86/events/intel/ds.c, line 1690 arch/x86/events/intel/p4.c, line 1000 arch/x86/kernel/kgdb.c, line 635 arch/x86/kernel/ptrace.c, line 503 arch/x86/kvm/pmu.c, line 56 arch/x86/kvm/pmu.c, line 70 arch/xtensa/kernel/perf_event.c, line 380 arch/xtensa/kernel/ptrace.c, line 366 drivers/oprofile/nmi_timer_int.c, line 30 drivers/oprofile/oprofile_perf.c, line 37 include/linux/perf_event.h, line 517 include/linux/perf_event.h, line 520 include/linux/perf_event.h, line 822 include/linux/perf_event.h, line 912 include/linux/perf_event.h, line 964 include/linux/perf_event.h, line 979 include/linux/perf_event.h, line 982 include/linux/perf_event.h, line 987 include/linux/perf_event.h, line 991 include/linux/perf_event.h, line 994 include/linux/perf_event.h, line 997 include/linux/perf_event.h, line 1012 include/linux/perf_event.h, line 1017 kernel/events/core.c, line 1729 kernel/events/core.c, line 1772 kernel/events/core.c, line 6045 kernel/events/core.c, line 6075 kernel/events/core.c, line 6083 kernel/events/core.c, line 6108 kernel/events/core.c, line 6215 kernel/events/core.c, line 6431 kernel/events/core.c, line 6555 kernel/events/core.c, line 6585 kernel/events/core.c, line 6593 kernel/events/core.c, line 6601 kernel/events/core.c, line 6623 kernel/events/core.c, line 6896 kernel/events/core.c, line 6993 kernel/events/core.c, line 7092 kernel/events/core.c, line 7236 kernel/events/core.c, line 7546 kernel/events/core.c, line 7582 kernel/events/core.c, line 7633 kernel/events/core.c, line 7705 kernel/events/core.c, line 7764 kernel/events/core.c, line 7854 kernel/events/core.c, line 7948 kernel/events/core.c, line 8027 kernel/events/core.c, line 8066 kernel/events/core.c, line 8118 kernel/events/core.c, line 8144 kernel/events/core.c, line 8192 kernel/events/core.c, line 8258 kernel/events/core.c, line 8297 kernel/events/core.c, line 8518 kernel/events/core.c, line 8532 kernel/events/core.c, line 8570 kernel/events/core.c, line 8818 kernel/events/core.c, line 8986 kernel/events/core.c, line 9424 kernel/events/ring_buffer.c, line 240 kernel/trace/bpf_trace.c, line 415 kernel/trace/bpf_trace.c, line 448 kernel/trace/bpf_trace.c, line 464 kernel/trace/bpf_trace.c, line 501 kernel/trace/bpf_trace.c, line 506 kernel/trace/bpf_trace.c, line 1066 kernel/trace/bpf_trace.c, line 1074 samples/hw_breakpoint/data_breakpoint.c, line 32 virt/kvm/arm/pmu.c, line 280