perf trace: No need to set PERF_SAMPLE_IDENTIFIER explicitely
Since 75562573 ("perf tools: Add support for PERF_SAMPLE_IDENTIFIER") we don't need explicitely set PERF_SAMPLE_IDENTIFIER, as perf_evlist__config() will do this for us, i.e. when there are more than one evsel in an evlist, it will check if some evsel has a sample_type different than the one on the first evsel in the list, setting PERF_SAMPLE_IDENTIFIER in that case. So, to simplify 'perf trace' codebase, ditch that check. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Hendrick Brueckner <brueckner@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-12xq6orhwttee2tdtu96ucrp@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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