linux-kernel - Re: [RFC][PATCH 0/5] arch: atomic rework

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <52F93FBB.1090108@tilera.com>
Date:	Mon, 10 Feb 2014 16:08:11 -0500
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC][PATCH 0/5] arch: atomic rework

(+LKML again)

On 2/10/2014 3:57 PM, Peter Zijlstra wrote:
> On Mon, Feb 10, 2014 at 03:50:04PM -0500, Chris Metcalf wrote:
>> On 2/6/2014 8:52 AM, Peter Zijlstra wrote:
>>> Its been compiled on everything I have a compiler for, however frv and
>>> tile are missing because they're special and I was tired.
>> So what's the specialness on tile?
> Its not doing the atomic work in ASM but uses magic builtins or such.
>
> I got the list of magic funcs for tilegx, but didn't look into the 32bit
> chips.

Oh, I see.  The <asm/atomic.h> files on tile are already reasonably well-factored.

It's possible you could do better, but I think not by too much, other than possibly
by using <asm-generic/atomic.h> for some of the common idioms like "subtraction
is addition with a negative second argument", etc., which hasn't been done elsewhere.

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/