linux-kernel - Re: Build breakage caused by the use of UDB

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Message-ID: <20251217230732.1e822263@endymion>
Date: Wed, 17 Dec 2025 23:07:32 +0100
From: Jean Delvare <jdelvare@...e.de>
To: Peter Zijlstra <peterz@...radead.org>
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: Re: Build breakage caused by the use of UDB

On Wed, 17 Dec 2025 13:47:13 +0100, Peter Zijlstra wrote:
> On Wed, Dec 17, 2025 at 01:35:36PM +0100, Peter Zijlstra wrote:
> > On Wed, Dec 17, 2025 at 12:44:23PM +0100, Jean Delvare wrote:  
> > > I must confess this is all way beyond me and I have no idea how this
> > > change can cause such a build failure, but it does. If it matters, my
> > > compiler is gcc 8.2.1.  
> > 
> > Well, that is somewhat unexpected. None of the build robots fingered
> > this. Is there a particular .config I should try?
> > 
> > I don't seem to have 8.2.1 at hand, but I'll try with 8.3.0.  
> 
> I had to (obviously) enable the RTL8192 bits, but then, yes. gcc-8 fails
> to build this while gcc-10 doesn't seem to have any problems (for some
> reason my random dev machine of the day doesn't seem to have gcc-9).

For the record, gcc 9.3.1 also fails to build kernel v6.18.1, for the
same reason.

-- 
Jean Delvare
SUSE L3 Support