netdev - Re: [PATCH net-next 03/12] net: bcmgenet: simplify circular pointer arithmetic

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Message-ID: <561fe914-d768-69a6-9b5a-5384dd613690@gmail.com>
Date:   Mon, 13 Mar 2017 17:54:47 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Doug Berger <opendmb@...il.com>
Cc:     robh+dt@...nel.org, mark.rutland@....com, davem@...emloft.net,
        rafal@...ecki.pl, xow@...gle.com, joel@....id.au,
        jon.mason@...adcom.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        pgynther@...gle.com, jaedon.shin@...il.com
Subject: Re: [PATCH net-next 03/12] net: bcmgenet: simplify circular pointer
 arithmetic

On 03/13/2017 05:41 PM, Doug Berger wrote:
> A 2's complement subtraction will always do a borrow, so masking
> off the sign bits is the same as conditionally adding (mask+1).
> 
> Signed-off-by: Doug Berger <opendmb@...il.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian