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Allow computation of thread map index from a PID. Note, with a 'struct perf_cpu_map' the sorted nature allows for a binary search to compute the index which isn't currently possible with a 'struct perf_thread_map' as they aren't guaranteed sorted. Signed-off-by: Ian Rogers <[email protected]> Acked-by: Gautam Menghani <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Howard Chu <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Kan Liang <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>