Re: [GIT PULL] locking changes for v5.18

[Peter Zijlstra]

On Fri, Mar 25, 2022 at 01:41:25PM +0200, Andy Shevchenko wrote:
> On Tue, Mar 22, 2022 at 03:58:47PM -0700, Linus Torvalds wrote:
> > On Tue, Mar 22, 2022 at 3:20 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
> > >
> > > Ah, you say build error because you have CONFIG_WERROR=y.
> > 
> > EVERYBODY should have CONFIG_WERROR=y on at least x86-64 and other
> > serious architectures, unless you have some completely random
> > experimental (and broken) compiler.
> > 
> > New compiler warnings are not acceptable.
> 
> What about old one? I have already complained in the early discussion that
> `make W=1 ...` is broken by this change. Enabling it without fixing
> _existing_ warnings on W=1 is not suitable for somebody. Now, I have to
> modify my configs to disable WERROR because of inability to built at all.
> 
> (Yes, I understand that I may drop W=1, but that's not the point. since I
>  want to have clean builds of a new code on level 1 of warnings)

It would be fairly easy to make scripts/Makefile.extrawarn strip out
-Werror when W= is used.