Re: NS83820 2.6.0-test5 driver seems unstable on IA64

From: Matthew Wilcox <>
Date: 2003-09-24 10:14:56
On Tue, Sep 23, 2003 at 04:37:44PM -0700, David S. Miller wrote:
> > >  Not only sparc would be effected by this.  Using {get,put}_unaligned()
> > >  all over the networking would incur a penalty for many platforms, not
> > >  just sparc.
> > 
> > Really?  I'd have thought that get/put_unaligned would be a simple
> > load/store for architectures which wish to implement it in that manner.
> Only on systems that have the "load upper/lower-unaligned"
> instructions.  On others it's a memmove().

It is at the moment, but why should it be?  Why can't it be implemented
as load-and-trap if that's the fastest way to do it?

(I can see this descending into get_unaligned_likely() and
get_aligned_unlikely() which i'd rather avoid ...)

"It's not Hollywood.  War is real, war is primarily not about defeat or
victory, it is about death.  I've seen thousands and thousands of dead bodies.
Do you think I want to have an academic debate on this subject?" -- Robert Fisk
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Received on Tue Sep 23 20:19:14 2003

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