linux-kernel - [PATCH][next] wifi: wil6210: wmi: Replace zero-length array with DECLARE_FLEX

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Message-ID: <ZGKHM+MWFsuqzTjm@work>
Date:   Mon, 15 May 2023 13:25:39 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH][next] wifi: wil6210: wmi: 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 arrays
declarations alone in structs with the new DECLARE_FLEX_ARRAY()
helper macro.

This helper allows for flexible-array members alone in structs.

Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/288
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/net/wireless/ath/wil6210/wmi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/wil6210/wmi.h b/drivers/net/wireless/ath/wil6210/wmi.h
index 9affa4525609..71bf2ae27a98 100644
--- a/drivers/net/wireless/ath/wil6210/wmi.h
+++ b/drivers/net/wireless/ath/wil6210/wmi.h
@@ -2763,7 +2763,7 @@ struct wmi_rf_xpm_write_result_event {
 
 /* WMI_TX_MGMT_PACKET_EVENTID */
 struct wmi_tx_mgmt_packet_event {
-	u8 payload[0];
+	DECLARE_FLEX_ARRAY(u8, payload);
 } __packed;
 
 /* WMI_RX_MGMT_PACKET_EVENTID */
-- 
2.34.1