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[v4,01/10] perf: Fix wrong comment about default event_idx

Message ID 20230703124647.215952-2-alexghiti@rivosinc.com (mailing list archive)
State New, archived
Headers show
Series riscv: Allow userspace to directly access perf counters | expand

Commit Message

Alexandre Ghiti July 3, 2023, 12:46 p.m. UTC 
Since commit c719f56092ad ("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>
---
 include/linux/perf_event.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index d5628a7b5eaa..56fe43b20966 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -442,7 +442,8 @@  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 */