From mboxrd@z Thu Jan  1 00:00:00 1970
From: Grant Likely <grant.likely@secretlab.ca>
Subject: Re: [PATCH] [V3] Add non-Virtex5 support for LL TEMAC driver
Date: Tue, 6 Apr 2010 11:54:42 -0600
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Cc: Eric Dumazet <eric.dumazet@gmail.com>, linuxppc-dev@ozlabs.org,
	netdev@vger.kernel.org, John Tyner <jtyner@cs.ucr.edu>,
	michal.simek@petalogix.com, john.williams@petalogix.com
To: John Linn <John.Linn@xilinx.com>
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On Mon, Apr 5, 2010 at 3:33 PM, John Linn <John.Linn@xilinx.com> wrote:
> From: Eric Dumazet [mailto:eric.dumazet@gmail.com]
>> > +/* Align the IP data in the packet on word boundaries as MicroBlaze
>> > + * needs it.
>> > + */
>> > +
>> > =A0#define XTE_ALIGN =A0 =A0 =A0 32
>> > -#define BUFFER_ALIGN(adr) ((XTE_ALIGN - ((u32) adr)) % XTE_ALIGN)
>> > +#define BUFFER_ALIGN(adr) ((34 - ((u32) adr)) % XTE_ALIGN)
>> >
>>
>> Very interesting way of doing this, but why such convoluted thing ?
>
> Grant might have insight into why this started this way, I just updated t=
o help with MicroBlaze alignment.

It was that way in the code I received from Yoshio Kashiwagi and David
H. Lynch.  I have no problem with it being changed.

Personally I would probably write a followup patch to change this to
netdev_alloc_skb_ip_align(), just to keep changes logically separated.
 But I'm okay with it rolled into this patch also.

g.