linux-kernel - [PATCH] perf tools: Replace zero-length array with flexible-array member

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Date:   Fri, 18 Feb 2022 03:13:52 +0000
From:   cgel.zte@...il.com
To:     mingo@...hat.com
Cc:     acme@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, adrian.hunter@...el.com,
        atrajeev@...ux.vnet.ibm.com, ak@...ux.intel.com,
        kan.liang@...ux.intel.com, deng.changcheng@....com.cn,
        german.gomez@....com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zeal Robot <zealci@....com.cn>
Subject: [PATCH] perf tools: Replace zero-length array with flexible-array member

From: Changcheng Deng <deng.changcheng@....com.cn>

There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use "flexible array members" for these cases. The older
style of one-element or zero-length arrays should no longer be used.
Reference:
https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@....com.cn>
---
 tools/perf/util/event.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index cdd72e05fd28..320cbcd5b902 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -308,7 +308,7 @@ struct perf_synth_intel_evt {
 		};
 		u32	cfe;
 	};
-	struct perf_synth_intel_evd evd[0];
+	struct perf_synth_intel_evd evd[];
 };
 
 struct perf_synth_intel_iflag_chg {
-- 
2.25.1