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Re: [RFC][PATCH] net drivers and cache alignment

To: "J.A. Magallon" <jamagallon@xxxxxxx>
Subject: Re: [RFC][PATCH] net drivers and cache alignment
From: Andrew Morton <akpm@xxxxxxxxx>
Date: Sat, 07 Dec 2002 15:45:21 -0800
Cc: Jeff Garzik <jgarzik@xxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
References: <3DF2781D.3030209@xxxxxxxxx> <20021207.144004.45605764.davem@xxxxxxxxxx> <3DF27EE7.4010508@xxxxxxxxx> <3DF2844C.F9216283@xxxxxxxxx> <20021207233745.GE3183@xxxxxxxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
"J.A. Magallon" wrote:
> 
> #define __cacheline_start   struct { } ____cacheline_aligned;

That will generate a warning on faster^Wolder versions of gcc.

mnm:/home/akpm> gcc t2.c
t2.c:11: warning: unnamed struct/union that defines no instances
t2.c:15: warning: unnamed struct/union that defines no instances
mnm:/home/akpm> gcc -v 
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/2.95.3/specs
gcc version 2.95.3 20010315 (release)


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