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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed, 3 Nov 2021 21:45:47 -0700
Message-ID: <CAHk-=wjZo3yj46FwVi0BNKfy5fZ4-UeWkeQ6nhcAbbnKS7K=dQ@mail.gmail.com>
Subject: Re: parisc build failures in mainline kernel
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Kees Cook <keescook@chromium.org>,
        Ard Biesheuvel <ardb@kernel.org>, Helge Deller <deller@gmx.de>,
        linux-parisc <linux-parisc@vger.kernel.org>
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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.

                   Linus