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From:   Alexandre Ghiti <alexghiti@rivosinc.com>
To:     Jonathan Corbet <corbet@lwn.net>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
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        Atish Patra <atishp@atishpatra.org>,
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Cc:     Alexandre Ghiti <alexghiti@rivosinc.com>,
        Atish Patra <atishp@rivosinc.com>
Subject: [PATCH v4 01/10] perf: Fix wrong comment about default event_idx
Date:   Thu, 27 Jul 2023 16:14:19 +0200
Message-Id: <20230727141428.962286-2-alexghiti@rivosinc.com>
In-Reply-To: <20230727141428.962286-1-alexghiti@rivosinc.com>
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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(-)

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 2166a69e3bf2..1269c96bc3b6 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -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 */
 
-- 
2.39.2