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perf: Fix wrong comment about default event_idx

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Since commit c719f56092 ("perf: Fix and clean up initialization of
pmu::event_idx"), event_idx default implementation has returned 0, not
idx + 1, so fix the comment that can be misleading.

Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
This commit is contained in:
Alexandre Ghiti
2023-08-02 10:03:19 +02:00
committed by Palmer Dabbelt
parent 06c2afb862
commit 366d259ff5
1 changed files with 2 additions and 1 deletions
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include/linux/perf_event.h
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@@ -445,7 +445,8 @@ struct pmu {
/*
* Will return the value for perf_event_mmap_page::index for this event,
* if no implementation is provided it will default to: event->hw.idx + 1.
* if no implementation is provided it will default to 0 (see
* perf_event_idx_default).
*/
int (*event_idx) (struct perf_event *event); /*optional */