linux-kernel - Re: [PATCH 2/2][next] net: ethtool: Avoid thousands of -Wflex-array-member-not-at-end warnings

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Message-ID: <20241028173248.582080ae@kernel.org>
Date: Mon, 28 Oct 2024 17:32:48 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc: "Gustavo A. R. Silva" <gustavoars@...nel.org>, Michael Chan
 <michael.chan@...adcom.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David S.
 Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo
 Abeni <pabeni@...hat.com>, Potnuri Bharat Teja <bharat@...lsio.com>,
 Christian Benvenuti <benve@...co.com>, Satish Kharat <satishkh@...co.com>,
 Manish Chopra <manishc@...vell.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH 2/2][next] net: ethtool: Avoid thousands of
 -Wflex-array-member-not-at-end warnings

On Mon, 28 Oct 2024 17:32:53 -0600 Gustavo A. R. Silva wrote:
> >> Additionally, update the type of some variables in various functions
> >> that don't access the flexible-array member, changing them to the
> >> newly created `struct ethtool_link_settings_hdr`.  
> > 
> > Why? Please avoid unnecessary code changes.  
> 
> This is actually necessary. As the type of the conflicting middle members
> changed, those instances that expect the type to be `struct ethtool_link_settings`
> should be adjusted to the new type. Another option is to leave the type
> unchanged and instead use container_of. See below.

Ah, that makes sense. So they need to be included int the newly split
patch. Please rephrase the commit message a bit, the current paragraph
reads as if this was a code cleanup.