linux-kernel - Re: [tip:perfcounters/urgent] x86: atomic64: Move the 32-bit atomic64

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Date:	Sat, 4 Jul 2009 10:05:24 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	mingo@...hat.com, hpa@...or.com, acme@...hat.com,
	linux-kernel@...r.kernel.org, eric.dumazet@...il.com,
	torvalds@...ux-foundation.org, a.p.zijlstra@...llo.nl,
	efault@....de, arnd@...db.de, fweisbec@...il.com,
	dhowells@...hat.com, akpm@...ux-foundation.org, tglx@...utronix.de,
	mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:perfcounters/urgent] x86: atomic64: Move the 32-bit atomic64_t implementation to a .c file

tip-bot for Ingo Molnar writes:

> Also, while at it, rename all uses of 'unsigned long long' to
> the much shorter u64.
> 
> This makes the appearance of the prototypes a lot nicer - and
> it also uncovered a few bugs where (yet unused) API variants
> had 'long' as their return type instead of u64.

Did you consider making atomic64_t a signed type on 32-bit x86 like it
is on all 64-bit platforms, and like atomic_t is everywhere?

Paul.
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