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

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Message-ID: <20240807164439.GC3006561@kernel.org>
Date: Wed, 7 Aug 2024 17:44:39 +0100
From: Simon Horman <horms@...nel.org>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Potnuri Bharat Teja <bharat@...lsio.com>,
	"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][next] ethtool: Avoid -Wflex-array-member-not-at-end
 warning

On Wed, Aug 07, 2024 at 05:26:02PM +0100, Simon Horman wrote:
> On Mon, Aug 05, 2024 at 09:38:08AM -0600, 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.
> > 
> > Move the conflicting declaration to the end of the structure. Notice
> > that `struct ethtool_dump` is a flexible structure --a structure that
> > contains a flexible-array member.
> > 
> > Fix the following warning:
> > ./drivers/net/ethernet/chelsio/cxgb4/cxgb4.h:1215:29: 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>
> 
> Reviewed-by: Simon Horman <horms@...nel.org>

Sorry, one minor nit, after the fact.

cxgb4 would probably be a better prefix than ethtool for this patch.
But then it would conflict, by name, with

- [PATCH] cxgb4: Avoid -Wflex-array-member-not-at-end warning
  https://lore.kernel.org/all/ZrD8vpfiYugd0cPQ@cute/