linux-kernel - Re: linux-next: build failure after merge of the mm tree

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Date:   Tue, 4 Jul 2023 05:51:38 +0000
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the mm tree

On Tue, Jul 4, 2023 at 2:33 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> On Mon, 3 Jul 2023 at 19:23, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > After merging the origin tree, today's linux-next build (arm64 defconfig)
> > failed like this:
> >
> > arch/arm64/mm/fault.c: In function 'do_page_fault':
>
> Yup, SeongJae Park sent me the same report, and it just made it to
> top-of-tree as commit 24be4d0b46bb ("arch/arm64/mm/fault: Fix
> undeclared variable error in do_page_fault()")

Thanks for fixing that! I hope to turn CONFIG_PER_VMA_LOCK back on soon.

>
> This was actually an architecture I test myself, but I think UP ends
> up turning off CONFIG_PER_VMA_LOCK.

Yes, CONFIG_PER_VMA_LOCK depends on SMP.

>
> I do wonder how much point there is to have a non-SMP build of
> architectures like x86-64 and arm64 at all...
>
> But I guess people still run them in qemu.
>
>              Linus