linux-kernel - Re: [PATCH v6 01/11] ARM: sunxi: smp: Move assembly code into a file

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Date:   Wed, 18 Apr 2018 18:05:03 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Mylène Josserand <mylene.josserand@...tlin.com>,
        Russell King <linux@...linux.org.uk>,
        Marc Zyngier <marc.zyngier@....com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, Simon <horms@...ge.net.au>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Magnus Damm <magnus.damm@...il.com>,
        "open list:ARM/SHMOBILE ARM..." <linux-renesas-soc@...r.kernel.org>,
        devicetree <devicetree@...r.kernel.org>,
        LABBE Corentin <clabbe.montjoie@...il.com>,
        Quentin Schulz <quentin.schulz@...tlin.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 01/11] ARM: sunxi: smp: Move assembly code into a file

On Wed, Apr 18, 2018 at 4:45 PM, Maxime Ripard
<maxime.ripard@...tlin.com> wrote:
> On Tue, Apr 17, 2018 at 07:25:15PM +0800, Chen-Yu Tsai wrote:
>> On Tue, Apr 17, 2018 at 7:17 PM, Maxime Ripard
>> <maxime.ripard@...tlin.com> wrote:
>> > On Tue, Apr 17, 2018 at 11:12:41AM +0800, Chen-Yu Tsai wrote:
>> >> On Tue, Apr 17, 2018 at 5:50 AM, Mylène Josserand
>> >> <mylene.josserand@...tlin.com> wrote:
>> >> > Move the assembly code for cluster cache enabling and resuming
>> >> > into an assembly file instead of having it directly in C code.
>> >> >
>> >> > Remove the CFLAGS because we are using the ARM directive "arch"
>> >> > instead.
>> >> >
>> >> > Signed-off-by: Mylène Josserand <mylene.josserand@...tlin.com>
>> >> > ---
>> >> >  arch/arm/mach-sunxi/Makefile  |  4 +--
>> >> >  arch/arm/mach-sunxi/headsmp.S | 80 +++++++++++++++++++++++++++++++++++++++++
>> >> >  arch/arm/mach-sunxi/mc_smp.c  | 82 +++----------------------------------------
>> >> >  3 files changed, 85 insertions(+), 81 deletions(-)
>> >> >  create mode 100644 arch/arm/mach-sunxi/headsmp.S
>> >>
>> >> I'm still not convinced about this whole "move ASM to separate
>> >> file" thing, especially now that you aren't actually adding any
>> >> sunxi-specific ASM code beyond a simple function call.
>> >>
>> >> Could you drop this for now?
>> >
>> > I'd really like to have this merged actually. There's a significant
>> > readibility improvement, so even if there's no particular functional
>> > improvement, I'd still call it a win.
>>
>> What parts do you consider hard to read? The extra quotes? Trailing
>> newline? Or perhaps the __stringify bits?
>
> All of this, plus the clobbers and operands.

Ok. Lets move it then.

The kbuild reports indicate this still needs some work though.

ChenYu