Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Fri, 5 Nov 2021 12:43:00 -0700
From:   Kees Cook <keescook@chromium.org>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Ard Biesheuvel <ardb@kernel.org>, Helge Deller <deller@gmx.de>,
        linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: parisc build failures in mainline kernel
Message-ID: <202111051242.86E9DBF@keescook>
References: <20211104031554.GA34798@roeck-us.net>
 <CAHk-=wjvWORtC5vwgavJxpBtV3-q9GGidezS_2NjtUFvqg7H5Q@mail.gmail.com>
 <77dc70f4-879a-eb5c-2dd6-682b4c7cfd03@roeck-us.net>
 <CAHk-=wjZo3yj46FwVi0BNKfy5fZ4-UeWkeQ6nhcAbbnKS7K=dQ@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAHk-=wjZo3yj46FwVi0BNKfy5fZ4-UeWkeQ6nhcAbbnKS7K=dQ@mail.gmail.com>
Precedence: bulk

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@roeck-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!

-- 
Kees Cook