From: Linus Torvalds <torvalds@osdl.org>
To: Andrea Arcangeli <andrea@suse.de>
Cc: Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@osdl.org>
Subject: Re: VM fixes [4/4]
Date: Fri, 24 Dec 2004 15:32:34 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.58.0412241530150.2353@ppc970.osdl.org> (raw)
In-Reply-To: <20041224174156.GE13747@dualathlon.random>
On Fri, 24 Dec 2004, Andrea Arcangeli wrote:
>
> /*
> + * All archs should support atomic ops with
> + * 1 byte granularity.
> + */
> + unsigned char memdie;
This simply fundamentally isn't true, last I looked.
At least older alphas do _not_ support atomic byte accesses, and if you
want atomic accesses you need to either use the defined smp-atomic
functions (ie things like the bit set operations), or you need to use
"int", which afaik all architectures _do_ support atomic accesses to.
Linus
next prev parent reply other threads:[~2004-12-24 23:32 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-24 17:41 VM fixes [4/4] Andrea Arcangeli
2004-12-24 18:01 ` David S. Miller
2004-12-24 18:22 ` Andrea Arcangeli
2004-12-24 20:55 ` David S. Miller
2004-12-24 21:25 ` William Lee Irwin III
2004-12-24 23:52 ` William Lee Irwin III
2004-12-24 23:55 ` David S. Miller
2004-12-24 23:41 ` Linus Torvalds
2004-12-25 2:27 ` Andrea Arcangeli
2004-12-25 3:24 ` VM fixes [PF_MEMDIE to TIF_MEMDIE] [5/4] Andrea Arcangeli
2004-12-25 14:53 ` VM fixes [->used_math to PF_USED_MATH] [6/4] Andrea Arcangeli
2004-12-27 7:03 ` Andy Isaacson
2005-01-02 15:41 ` Andrea Arcangeli
2005-01-08 17:17 ` William Lee Irwin III
2004-12-25 0:06 ` VM fixes [4/4] Mitchell Blank Jr
2004-12-25 2:37 ` Andrea Arcangeli
2004-12-24 23:32 ` Linus Torvalds [this message]
2004-12-27 13:38 ` Rik van Riel
2004-12-28 9:42 ` Thomas Gleixner
2005-01-02 15:51 ` Andrea Arcangeli
2005-01-02 16:44 ` Rik van Riel
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