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In1d55e8ef34("perf tools: Introduce opt_event_config nonterminal") I removed the unconditional "'/' '/'" for pmu events such as "intel_pt//" but forgot to use opt_event_config where it expected some event_config, oops. Fix it. Noticed when trying to use: # perf record -e intel_pt// -a sleep 1 event syntax error: 'intel_pt//' \___ parser error Run 'perf list' for a list of valid events Usage: perf record [<options>] [<command>] or: perf record [<options>] -- <command> [<options>] -e, --event <event> event selector. use 'perf list' to list available events # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Fixes:1d55e8ef34("perf tools: Introduce opt_event_config nonterminal") Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>