linux-kernel - Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs with xpcs-plat driver

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Message-ID: <aR4bo4cPwWdapr7j@smile.fi.intel.com>
Date: Wed, 19 Nov 2025 21:33:55 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>,
	Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	linux-kernel@...r.kernel.org, Serge Semin <fancer.lancer@...il.com>,
	Herve Codina <herve.codina@...tlin.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH net-next 14/15] net: dsa: sja1105: replace mdiobus-pcs
 with xpcs-plat driver

On Wed, Nov 19, 2025 at 10:35:45AM -0800, Jakub Kicinski wrote:
> On Wed, 19 Nov 2025 19:39:32 +0200 Andy Shevchenko wrote:
> > On Wed, Nov 19, 2025 at 05:23:48PM +0000, Russell King (Oracle) wrote:
> > > On Wed, Nov 19, 2025 at 06:17:48PM +0200, Andy Shevchenko wrote:  
> > > > On Wed, Nov 19, 2025 at 08:11:12AM -0800, Jakub Kicinski wrote:  
> > > I can say that stuff such as unused const variables gets found by
> > > nipa, via -Wunused-const-variable, which as I understand it is a
> > > W=1 thing.
> > > 
> > > I suspect CONFIG_WERROR=y isn't used (I don't know) as that would
> > > stop the build on warnings, whereas what is done instead is that
> > > the output of the build is analysed, and the number of warnings
> > > counted and reported in patchwork. Note that the "build" stuff
> > > reports number of errors/warnings before and after the patch.
> > > 
> > > Hope this answers your question.  
> > 
> > Pretty much, thanks!
> 
> We do:

A-ha, thanks!

> prep_config() {
>   make LLVM=1 O=$output_dir allmodconfig
>   ./scripts/config --file $output_dir/.config -d werror
>   ./scripts/config --file $output_dir/.config -d drm_werror
>   ./scripts/config --file $output_dir/.config -d kvm_werror
> }
> 
> I have strong feelings about people who think Werror is an acceptable
> practice in 2025, but let me not violate the CoC here..

WERROR=y by default was introduced you-know-by-whom :-)

-- 
With Best Regards,
Andy Shevchenko