perf/core: Add perf_sample_save_brstack() helper

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When we saves the branch stack to the perf sample data, we needs to
update the sample flags and the dynamic size.  To make sure this is
done consistently, add the perf_sample_save_brstack() helper and
convert all call sites.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230118060559.615653-5-namhyung@kernel.org

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This commit is contained in:

Namhyung Kim 2023-01-17 22:05:55 -08:00 • committed by Ingo Molnar

parent 0a9081cf0a

commit eb55b455ef

6 changed files with 53 additions and 53 deletions

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3

arch/powerpc/perf/core-book3s.c

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6

arch/x86/events/amd/core.c

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arch/x86/events/intel/core.c

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arch/x86/events/intel/ds.c

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include/linux/perf_event.h

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kernel/events/core.c

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