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From:   Michael Ellerman <mpe@ellerman.id.au>
To:     Ard Biesheuvel <ardb@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Cc:     Keith Packard <keithpac@amazon.com>,
        Russell King <linux@armlinux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Paul Mackerras <paulus@samba.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Heiko Carstens <hca@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Kees Cook <keescook@chromium.org>,
        Andy Lutomirski <luto@kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        "open list:LINUX FOR POWERPC (32-BIT AND 64-BIT)" 
        <linuxppc-dev@lists.ozlabs.org>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        "open list:S390" <linux-s390@vger.kernel.org>
Subject: Re: [RFC PATCH 4/8] powerpc: add CPU field to struct thread_info
In-Reply-To: <87ee99lii7.fsf@mpe.ellerman.id.au>
References: <20210914121036.3975026-1-ardb@kernel.org>
 <20210914121036.3975026-5-ardb@kernel.org>
 <CAMj1kXEojbQbNzCP39KT4EzFAyW3J1Tfm_stCZ+fGo8_SO90PA@mail.gmail.com>
 <87ee99lii7.fsf@mpe.ellerman.id.au>
Date:   Tue, 28 Sep 2021 10:16:10 +1000
Message-ID: <87pmst1rn9.fsf@mpe.ellerman.id.au>
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Michael Ellerman <mpe@ellerman.id.au> writes:
> Ard Biesheuvel <ardb@kernel.org> writes:
>> On Tue, 14 Sept 2021 at 14:11, Ard Biesheuvel <ardb@kernel.org> wrote:
>>>
>>> The CPU field will be moved back into thread_info even when
>>> THREAD_INFO_IN_TASK is enabled, so add it back to powerpc's definition
>>> of struct thread_info.
>>>
>>> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
>>
>> Michael,
>>
>> Do you have any objections or issues with this patch or the subsequent
>> ones cleaning up the task CPU kludge for ppc32? Christophe indicated
>> that he was happy with it.
>
> No objections, it looks good to me, thanks for cleaning up that horror :)
>
> It didn't apply cleanly to master so I haven't tested it at all, if you can point me at a
> git tree with the dependencies I'd be happy to run some tests over it.

Actually I realised I can just drop the last patch.

So that looks fine, passes my standard quick build & boot on qemu tests,
and builds with/without stack protector enabled.

cheers