linux-kernel - Re: [PATCH v2 1/3] mtd: nand: Cleanup/rework the atmel

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Message-ID: <20170221135541.GV21222@n2100.armlinux.org.uk>
Date:   Tue, 21 Feb 2017 13:55:41 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Brian Norris <computersforpeace@...il.com>,
        Pawel Moll <pawel.moll@....com>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Richard Weinberger <richard@....at>,
        Kumar Gala <galak@...eaurora.org>,
        Nicolas Ferre <nicolas.ferre@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Wenyou Yang <wenyou.yang@...el.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Josh Wu <rainyfeeling@...look.com>,
        "open list:MEMORY TECHNOLOGY..." <linux-mtd@...ts.infradead.org>,
        Cyrille Pitchen <cyrille.pitchen@...el.com>,
        Haavard Skinnemoen <hskinnemoen@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Hans-Christian Egtvedt <egtvedt@...fundet.no>
Subject: Re: [PATCH v2 1/3] mtd: nand: Cleanup/rework the atmel_nand driver

On Tue, Feb 21, 2017 at 01:02:21PM +0200, Andy Shevchenko wrote:
> On Tue, Feb 21, 2017 at 12:26 PM, Boris Brezillon
> <boris.brezillon@...e-electrons.com> wrote:
> > On Tue, 21 Feb 2017 12:03:45 +0200
> > Andy Shevchenko <andy.shevchenko@...il.com> wrote:
> 
> >> 1. For example,
> >>
> >> #define ATMEL_NFC_CMD(pos, cmd)                        ((cmd) <<
> >> (((pos) * 8) + 2))
> >
> > Well, I like to explicitly put parenthesis even when operator
> > precedence guarantees the order of the calculation ('*' is preceding
> > '+').
> 
> That's my point. I'm not a LISP programmer.
> Personally I think it makes readability worse.

+1.  I find unnecessary parenthesis is an effective obfuscation technique.

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