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Date: Sat, 25 Jan 2025 21:00:16 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Uros Bizjak <ubizjak@gmail.com>, linux-mm@kvack.org,
 mm-commits@vger.kernel.org, linux-kernel@vger.kernel.org, Stephen Rothwell
 <sfr@canb.auug.org.au>, Dan Carpenter <dan.carpenter@linaro.org>, Anders
 Roxell <anders.roxell@linaro.org>, Naresh Kamboju
 <naresh.kamboju@linaro.org>
Subject: Re: [GIT PULL] MM updates for 6.14-rc1
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On Sat, 25 Jan 2025 14:09:16 -0800 Linus Torvalds <torvalds@linux-foundation.org> wrote:

> On Fri, 24 Jan 2025 at 16:22, Andrew Morton <akpm@linux-foundation.org> wrote:
> >
> > Linus, please merge the MM updates for the 6.14 development cycle,
> 
> This does not build at all for me.
> 
> I get
> 
>     ./arch/x86/include/asm/current.h:49:9: error: call to undeclared
> function '__typeof_unqual__'; ISO C99 and later do not support
> implicit function declarations [-Wimplicit-function-declaration]
> 
> when running the Rust 'bindgen', and what seems to be going on is that
> my version of *gcc* does support __typeof_unqual__, so I end up with
> 
>     CONFIG_CC_HAS_TYPEOF_UNQUAL=y
> 
> in my kernel config, but I think that 'bindgen' that generates the
> Rust bindings is based on LLVM, and clearly does not understand
> __typeof_unqual__.
> 
> I have bindgen 0.69.5 (plain F40 install), in case somebody wants to test.
> 
> Apparently few people test linux-next with Rust enabled, and the
> reports that I find on lkml were ignored.
>
> I do see reports of this failure on lkml from mid-December, so it's
> not like I'm the first person ever to see this.
> 

Well dang, nobody told me, and I assume Stephen didn't find out.

Guys, if tree owners are carrying bad patches, please do give them a
heads-up!

> Anyway, pulled and then unpulled again.

OK, I've dropped Uroz's series "Enable strict percpu address space
checks", shall resend the pull request soon.

And I shall continue to scratch my head over
Documentation/rust/quick-start.rst.