Re: [Xen-devel] My turn to rant about types... bitops

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 6 Oct 2005, at 12:28, Jimi Xenidis wrote:

> Always the job of the maintainer to ask why :)
> Well, since linux bitops use unsigned long, being the largest machine 
> word and therefore the most efficient, we get alignment issues.
> The next request is really the jist of what we are after, doing 64bit 
> operations 32bit aligned data kills us performance wise and WRT bitops 
> cannot be used for atomic ops. If htis was just Xen I'd consider 
> adding 32bit bitops but I doubt I'd be able to do that in Linux which 
> does not provide "u32" bitops.
The alignment issue is a fair point. I'll see if changing the type 
would affect much code.
 -- Keir


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