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perf/core: Add perf_clear_branch_entry_bitfields() helper

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Make it simpler to reset all the info fields on the
perf_branch_entry by adding a helper inline function.

The goal is to centralize the initialization to avoid missing
a field in case more are added.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220322221517.2510440-2-eranian@google.com
This commit is contained in:
Stephane Eranian 2022-03-22 15:15:05 -07:00 • committed by Peter Zijlstra
parent 3123109284
commit bfe4daf850
2 changed files with 33 additions and 19 deletions
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16
include/linux/perf_event.h
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@ -1063,6 +1063,22 @@ static inline void perf_sample_data_init(struct perf_sample_data *data,
data->txn = 0;
}
/*
* Clear all bitfields in the perf_branch_entry.
* The to and from fields are not cleared because they are
* systematically modified by caller.
*/
static inline void perf_clear_branch_entry_bitfields(struct perf_branch_entry *br)
{
br->mispred = 0;
br->predicted = 0;
br->in_tx = 0;
br->abort = 0;
br->cycles = 0;
br->type = 0;
br->reserved = 0;
}
extern void perf_output_sample(struct perf_output_handle *handle,
struct perf_event_header *header,
struct perf_sample_data *data,