linux-kernel - Re: [PATCH v2][next] net: atlantic: Avoid -Wflex-array-member-not-at-end warnings

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Message-ID: <Z6GwydOggtMRqYCY@mev-dev.igk.intel.com>
Date: Tue, 4 Feb 2025 07:16:41 +0100
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Igor Russkikh <irusskikh@...vell.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v2][next] net: atlantic: Avoid
 -Wflex-array-member-not-at-end warnings

On Tue, Feb 04, 2025 at 12:40:49PM +1030, Gustavo A. R. Silva wrote:
> -Wflex-array-member-not-at-end was introduced in GCC-14, and we are
> getting ready to enable it, globally.
> 
> Remove unused flexible-array member `buf` and, with this, fix the following
> warnings:
> drivers/net/ethernet/aquantia/atlantic/aq_hw.h:197:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> drivers/net/ethernet/aquantia/atlantic/hw_atl/../aq_hw.h:197:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]
> 
> Suggested-by: Igor Russkikh <irusskikh@...vell.com>
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> ---
> Changes in v2:
>  - Remove unused flex-array member. (Igor)
> 
> v1:
>  - Link: https://lore.kernel.org/linux-hardening/ZrDwoVKH8d6TdVxn@cute/
> 
>  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
> index f5901f8e3907..f6b990b7f5b4 100644
> --- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
> +++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h
> @@ -226,7 +226,6 @@ struct __packed offload_info {
>  	struct offload_port_info ports;
>  	struct offload_ka_info kas;
>  	struct offload_rr_info rrs;
> -	u8 buf[];
>  };

Reviewed-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>

>  
>  struct __packed hw_atl_utils_fw_rpc {
> -- 
> 2.43.0
>