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From:   Ard Biesheuvel <ardb@kernel.org>
Date:   Thu, 21 Oct 2021 09:02:32 +0200
Message-ID: <CAMj1kXHem8-qpNswtRcEKErncpO65JpQJQL3-8k_-qzUm4S4_Q@mail.gmail.com>
Subject: Re: [ardb:arm-vmap-stacks 5/20] arch/arm/mm/context.c:112:28: error:
 no member named 'task' in 'struct thread_info'
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     kernel test robot <lkp@intel.com>, llvm@lists.linux.dev,
        kbuild-all@lists.01.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Keith Packard <keithpac@amazon.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
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On Thu, 21 Oct 2021 at 08:55, Arnd Bergmann <arnd@kernel.org> wrote:
>
> On Tue, Oct 5, 2021 at 4:03 AM kernel test robot <lkp@intel.com> wrote:
> >
>
> > All errors (new ones prefixed by >>):
> >
> > >> arch/arm/mm/context.c:112:28: error: no member named 'task' in 'struct thread_info'
> >            pid = task_pid_nr(thread->task) << ASID_BITS;
> >                              ~~~~~~  ^
> >    1 error generated.
>
> I ran into this as well on my randconfig builds, though it happens very rarely.
>
> Apparently CONFIG_THREAD_INFO_IN_TASK is incompatible with
> CONFIG_PID_IN_CONTEXTIDR, but should be easy to fix by changing that
> one line to do the right thing.
>

None of the existing configs enable that, so that is why I never saw
this even with all the kernelci coverage.

I'll send a patch to fix this.