linux-kernel - [PATCH][next] ath6kl: wmi: Avoid -Wflex-array-member-not-at-end warning

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Message-ID: <aR153k4ExCD-QTMq@kspp>
Date: Wed, 19 Nov 2025 17:03:42 +0900
From: "Gustavo A. R. Silva" <gustavoars@...nel.org>
To: Jeff Johnson <jeff.johnson@....qualcomm.com>,
	Kalle Valo <quic_kvalo@...cinc.com>
Cc: linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	linux-hardening@...r.kernel.org
Subject: [PATCH][next] ath6kl: wmi: Avoid -Wflex-array-member-not-at-end
 warning

-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Move the conflicting declaration (which happens to be in a union, so
we're moving the entire union) to the end of the corresponding
structure. Notice that `struct bss_bias_info` is a flexible structure,
this is a structure that contains a flexible-array member.

With these changes fix the following warning:

drivers/net/wireless/ath/ath6kl/wmi.h:1658:20: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/net/wireless/ath/ath6kl/wmi.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath6kl/wmi.h b/drivers/net/wireless/ath/ath6kl/wmi.h
index 3080d82e25cc..0e7810b9372f 100644
--- a/drivers/net/wireless/ath/ath6kl/wmi.h
+++ b/drivers/net/wireless/ath/ath6kl/wmi.h
@@ -1649,6 +1649,9 @@ struct low_rssi_scan_params {
 } __packed;
 
 struct roam_ctrl_cmd {
+	u8 roam_ctrl;
+
+	/* Must be last as it ends in a flexible-array member. */
 	union {
 		u8 bssid[ETH_ALEN]; /* WMI_FORCE_ROAM */
 		u8 roam_mode; /* WMI_SET_ROAM_MODE */
@@ -1656,7 +1659,6 @@ struct roam_ctrl_cmd {
 		struct low_rssi_scan_params params; /* WMI_SET_LRSSI_SCAN_PARAMS
 						     */
 	} __packed info;
-	u8 roam_ctrl;
 } __packed;
 
 struct set_beacon_int_cmd {
-- 
2.43.0