linux-kernel - [PATCH] ath6kl: Replace zero-length arrays with DECLARE_FLEX

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Message-Id: <20230731012941.21875-1-rauji.raut@gmail.com>
Date:   Sun, 30 Jul 2023 18:29:41 -0700
From:   Atul Raut <rauji.raut@...il.com>
To:     kvalo@...nel.org
Cc:     linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH] ath6kl: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

Because zero-length arrays are obsolete, replacing them with
C99 flexible-array members.
Instead of defining a zero-length array, use the new
DECLARE_FLEX_ARRAY() auxiliary macro.

This fixes warnings such as:
./drivers/net/wireless/ath/ath6kl/usb.c:109:8-12: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)

Signed-off-by: Atul Raut <rauji.raut@...il.com>
---
 drivers/net/wireless/ath/ath6kl/usb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath6kl/usb.c b/drivers/net/wireless/ath/ath6kl/usb.c
index 5220809841a6..bb3771a3897c 100644
--- a/drivers/net/wireless/ath/ath6kl/usb.c
+++ b/drivers/net/wireless/ath/ath6kl/usb.c
@@ -106,7 +106,7 @@ struct ath6kl_usb_ctrl_diag_cmd_write {
 	__le32 cmd;
 	__le32 address;
 	__le32 value;
-	__le32 _pad[1];
+	DECLARE_FLEX_ARRAY(__le32, _pad);
 } __packed;
 
 struct ath6kl_usb_ctrl_diag_cmd_read {
-- 
2.34.1