perf parse-events: Minor grouping tidy up

Add comments. Ensure leader->group_name is freed before overwriting
it.

Signed-off-by: Ian Rogers <[email protected]>
Reviewed-by: Kan Liang <[email protected]>
Tested-by: Atish Patra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Beeman Strong <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[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]>

0 files changed, 0 insertions, 0 deletions