linux-kernel - Re: [GIT PULL] Kbuild updates for v6.16-rc1

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Message-ID: <aEl9yiUdQLetv_T_@google.com>
Date: Wed, 11 Jun 2025 05:59:54 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Heiko Carstens <hca@...ux.ibm.com>
Cc: Masahiro Yamada <masahiroy@...nel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, 
	Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>
Subject: Re: [GIT PULL] Kbuild updates for v6.16-rc1

On Wed, Jun 11, 2025, Heiko Carstens wrote:
> On Sun, Jun 08, 2025 at 01:41:18AM +0900, Masahiro Yamada wrote:
> > Kbuild updates for v6.16
> > 
> >  - Add support for the EXPORT_SYMBOL_GPL_FOR_MODULES() macro, which exports a
> >    symbol only to specified modules
> > 
> >  - Improve ABI handling in gendwarfksyms
> > 
> >  - Forcibly link lib-y objects to vmlinux even if CONFIG_MODULES=n
> > 
> >  - Add checkers for redundant or missing <linux/export.h> inclusion
> 
> As you write in commit a934a57a42f6 ("scripts/misc-check: check missing
> #include <linux/export.h> when W=1") this adds now 4000+ extra warnings
> for W=1 builds, which makes such builds more or less useless for me.
> 
> Also the commit only describes what you want to achieve, but not why.
> I can only guess that you want to reduce header dependencies(?).
> 
> Don't get me wrong, I can address all of this trivial churn for s390, however
> enforcing so many extra warnings to everyone with W=1 builds doesn't look like
> the right approach to me.

+1.  This seems like a recipe for an endless game of whack-a-mole.