From: Andi Kleen <ak@suse.de>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org, ak@suse.de
Subject: Re: [PATCH] atomic_long_t & include/asm-generic/atomic.h V2
Date: Wed, 14 Dec 2005 03:57:10 +0100 [thread overview]
Message-ID: <20051214025710.GD23384@wotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.62.0512131849550.24909@schroedinger.engr.sgi.com>
> > How about requiring that all 64-bit archs implement atomic64_t and do:
>
> It may be reasonable to have 64 bit arches that are not
> capable of 64 bit atomic ops. As far as I can remember sparc was initially
> a 32 bit platform without 32 bit atomic ops.
Why? I don't think we have any crippled 64bit platforms like this.
And if somebody wants to port linux to such a hypothetical crippled
64bit platform they can do the necessary work themselves.
Or just implement 64bit atomic_t with spinlocks.
-Andi
next prev parent reply other threads:[~2005-12-14 2:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-13 22:19 [PATCH] atomic_long_t & include/asm-generic/atomic.h V2 Christoph Lameter
2005-12-13 23:49 ` Andrew Morton
2005-12-14 2:55 ` Christoph Lameter
2005-12-14 2:57 ` Andi Kleen [this message]
2005-12-14 3:26 ` David S. Miller
2005-12-14 5:18 ` Christoph Lameter
2005-12-14 9:00 ` Paul Jackson
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