linux-kernel - [PATCH] sctp: Replace zero-length array with DECLARE_FLEX

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Date:   Tue, 10 Jan 2023 04:37:33 -0500
From:   Bo Liu <liubo03@...pur.com>
To:     <vyasevich@...il.com>, <nhorman@...driver.com>,
        <marcelo.leitner@...il.com>
CC:     <linux-sctp@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bo Liu <liubo03@...pur.com>
Subject: [PATCH] sctp: Replace zero-length array with DECLARE_FLEX_ARRAY() helper

Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members instead. So, replace zero-length array
declaration in struct fid with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for a flexible-array member in a union.

Signed-off-by: Bo Liu <liubo03@...pur.com>
---
 include/linux/sctp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index 358dc08e0831..09fdb7206f08 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -239,7 +239,7 @@ struct sctp_idatahdr {
 		__u32 ppid;
 		__be32 fsn;
 	};
-	__u8 payload[0];
+	DECLARE_FLEX_ARRAY(__u8, payload);
 };
 
 struct sctp_idata_chunk {
-- 
2.27.0