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SubjectRe: atomic64_t proposal
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   From: Andi Kleen <ak@suse.de>
Date: 27 Aug 2002 21:58:45 +0200

If yes, the implementation on 32bit could be a problem. e.g. some
archs need space in there for spinlocks, so it would be needed to limit
the usable range.

x86 would need 1 bit, some other 32-bit platforms would be ok
with just a byte (ie. 8 bits).

I don't like this whole transparent idea just like you Andi.

People should ask for the types they want, if they want 64-bits
of counter, they should explicitly use atomic64_t and use the
atomic64_t operations on that type.
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