Re: conflicting alignment requirements

[Andi Kleen <ak@xxxxxx>]

On Wed, Jul 25, 2001 at 12:57:37AM +0200, Jacob Avraham wrote:
> I noticed that some ethernet drivers, like the tulip,
> require that the receive buffers be 4 byte align
> (I believe due to h/w constrains).
> On the  other hand, some upper layer code, like tc
> (for non x86/68k), checks if the IP header is 4 byte align,
> and if not, doesn't handle the packet.
> So it looks like tc and tulip can not be used on other architectures.
> 
> Has this been discussed before and if yes what was the outcome?
> In the short term, would that be OK to remove this restriction
> from tc?

If some network stack code checks the alignment and reject unaligned
packets it is a bug. Could you tell exactly which code does that?

-Andi