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From:   Arnd Bergmann <arnd@kernel.org>
Date:   Wed, 21 Oct 2020 14:55:29 +0200
Message-ID: <CAK8P3a12DXAP6NhHxf9Fr9pxJ-yjE5L7KsAMNEtSJ01xR6asXw@mail.gmail.com>
Subject: Re: [PATCH 2/3] arm: introduce IRQ stacks
To:     Russell King - ARM Linux admin <linux@armlinux.org.uk>
Cc:     Arnd Bergmann <arnd@kernel.org>,
        Maninder Singh <maninder1.s@samsung.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Jian Cai <caij2003@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Marc Zyngier <maz@kernel.org>,
        Valentin Schneider <valentin.schneider@arm.com>,
        Vincent Whitchurch <vincent.whitchurch@axis.com>,
        Nathan Huckleberry <nhuck@google.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Dmitry Safonov <0x7f454c46@gmail.com>,
        Will Deacon <will@kernel.org>, v.narang@samsung.com,
        a.sahrawat@samsung.com,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
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On Wed, Oct 21, 2020 at 2:45 PM Russell King - ARM Linux admin
<linux@armlinux.org.uk> wrote:
> On Wed, Oct 21, 2020 at 02:42:48PM +0200, Arnd Bergmann wrote:
> > >
> > > - define 'current' as 'this_cpu_read_stable(current_task);'
> > > - convert to CONFIG_THREAD_INFO_IN_TASK
>
> That means we need to also code that up in assembly - remember, we
> need to access thread_info from assembly code.

Are there any obvious places that need patching aside from
.macro get_thread_info? I did expect the above conversion to
be somewhat more complicated than Maninder's original patch,
but that part seems easy enough.

       Arnd