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Check sample_type in perf_sample_save_callchain() to prevent saving callchain data when it isn't required. Suggested-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Yabin Cui <yabinc@google.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Ian Rogers <irogers@google.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240515193610.2350456-3-yabinc@google.com