linux-kernel - Re: parisc build failures in mainline kernel

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Message-ID: <CAMj1kXGhHGD047BzXC3m9afW+9x_UBj1jgDdC+i2GLqHbrj-Fg@mail.gmail.com>
Date:   Fri, 5 Nov 2021 20:43:52 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Guenter Roeck <linux@...ck-us.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Helge Deller <deller@....de>,
        linux-parisc <linux-parisc@...r.kernel.org>
Subject: Re: parisc build failures in mainline kernel

On Fri, 5 Nov 2021 at 20:43, Kees Cook <keescook@...omium.org> wrote:
>
> On Wed, Nov 03, 2021 at 09:45:47PM -0700, Linus Torvalds wrote:
> > On Wed, Nov 3, 2021 at 9:30 PM Guenter Roeck <linux@...ck-us.net> wrote:
> > >
> > > Unfortunately not. With that patch it complains about task_struct.
> >
> > Gaah. You'll need something like this too
> >
> > -       DEFINE(TASK_CPU, offsetof(struct task_struct, cpu));
> > +       DEFINE(TASK_CPU, offsetof(struct task_struct, thread_info.cpu));
> >
> > in arch/parisc/kernel/asm-offsets.c.
> >
> > And really, it should probably be renamed as TASK_TI_CPU, but then you
> > have to rename all the uses too.
> >
> > There might be other details like that lurking.
>
> I'll check this out too if Ard doesn't beat me to it. Thanks for the
> investigation and sorry for the breakage!
>

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2a2e8202c7a16a85a881ad2b6e32ccbebdc01dda