linux-kernel - [PATCH][next] ath: Replace zero-length arrays with flexible-array members

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Date:   Wed, 16 Feb 2022 13:49:15 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Kalle Valo <kvalo@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
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] ath: Replace zero-length arrays with flexible-array
 members

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”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/78
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/net/wireless/ath/spectral_common.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/spectral_common.h b/drivers/net/wireless/ath/spectral_common.h
index e14f374f97d4..fe187c1fbeb0 100644
--- a/drivers/net/wireless/ath/spectral_common.h
+++ b/drivers/net/wireless/ath/spectral_common.h
@@ -108,7 +108,7 @@ struct fft_sample_ath10k {
 	u8 avgpwr_db;
 	u8 max_exp;
 
-	u8 data[0];
+	u8 data[];
 } __packed;
 
 struct fft_sample_ath11k {
@@ -123,7 +123,7 @@ struct fft_sample_ath11k {
 	__be32 tsf;
 	__be32 noise;
 
-	u8 data[0];
+	u8 data[];
 } __packed;
 
 #endif /* SPECTRAL_COMMON_H */
-- 
2.27.0