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SubjectRe: [PATCH] 2.5.1-pre5: per-cpu areas
>>>>> On Fri, 15 Mar 2002 15:07:27 +1100, Rusty Russell <> said:

Rusty> Sorry, after thought, I've reverted to my original position. the
Rusty> original SMP per_cpu()/this_cpu() implementations were broken.

Rusty> They must return an lvalue, otherwise they're useless for 50% of cases
Rusty> (ie. assignment). x86_64 can still use its own mechanism for
Rusty> arch-specific per-cpu data, of course.

What's your position about someone taking the address of this_cpu(foo)
and passing it to another CPU? IMO, the effect of this should be
allowed to be implementation-dependent. If you agree, perhaps it
would be good to add a comment to this effect?

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