linux-kernel - Re: [PATCH v4 45/47] net/wan/fsl_ucc_hdlc: reject muram offsets above 64K

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Message-ID: <3db19b28-90a4-f204-07b3-517cfd44010b@kernel.org>
Date:   Fri, 15 Nov 2019 08:33:52 -0600
From:   Timur Tabi <timur@...nel.org>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Christophe Leroy <christophe.leroy@....fr>,
        linuxppc-dev@...ts.ozlabs.org,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Scott Wood <oss@...error.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v4 45/47] net/wan/fsl_ucc_hdlc: reject muram offsets above
 64K

On 11/15/19 1:44 AM, Rasmus Villemoes wrote:
> I can change it, sure, but it's a matter of taste. To me the above asks
> "does the value change when it is truncated to a u16" which makes
> perfect sense when the value is next used with iowrite16be(). Using a
> comparison to U16_MAX takes more brain cycles for me, because I have to
> think whether it should be > or >=, and are there some
> signedness/integer promotion business interfering with that test.

Ok.