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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Michael Schnell <mschnell@lumino.de>
Cc: nios2-dev <nios2-dev@sopc.et.ntust.edu.tw>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: atomic RAM ?
Date: Wed, 14 Apr 2010 13:57:04 +0100	[thread overview]
Message-ID: <20100414135704.3fc7b713@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4BC5B915.6090803@lumino.de>

> > FUTEX  ... is an implementation ...  for certain classes of processor.
> Alan,
> 
> If that is true "in depth", there should be no FUTEX-relevant  code,
> neither in the Kernel, nor in the library, that should be considered
> "arch-independent".

We have a lot of kernel code which is only usable on some architectures
and a few opt out of. The largest example of course being the mm layer
which is strictly for MMU equipped systems.

The important point is that you don't *have* to use futex to provide the
posix pthread lock primitives if they don't fit your platform.


  reply	other threads:[~2010-04-14 12:53 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-08  7:32 atomic RAM ? Michael Schnell
     [not found] ` <4BBDA1CB.3070204@davidnewall.com>
2010-04-08  9:52   ` Michael Schnell
2010-04-12 12:54     ` Pavel Machek
2010-04-14  8:42       ` Michael Schnell
     [not found] ` <k2gbca41b4c1004080243nc45a10aereaae18557808c943@mail.gmail.com>
2010-04-08 10:12   ` Michael Schnell
2010-04-08 10:45 ` Alan Cox
2010-04-08 12:11   ` Michael Schnell
2010-04-08 12:14     ` David Miller
2010-04-08 12:30       ` Michael Schnell
2010-04-08 14:15         ` Arnd Bergmann
2010-04-09 10:54           ` Michael Schnell
     [not found]           ` <4BBEECC8.10005@lumino.de>
     [not found]             ` <201004091714.04990.arnd@arndb.de>
2010-04-12  9:58               ` Michael Schnell
2010-04-12 15:02                 ` Arnd Bergmann
2010-04-13 10:11                   ` Michael Schnell
     [not found]                 ` <u2j42b5547a1004120845x87d7f2f7wd4acea1144153dd6@mail.gmail.com>
2010-04-13  8:39                   ` [Nios2-dev] " Michael Schnell
2010-04-08 13:37     ` Alan Cox
2010-04-09 10:55       ` Michael Schnell
2010-04-09 11:54         ` Alan Cox
2010-04-09 12:53           ` Michael Schnell
2010-04-09 13:15             ` Alan Cox
2010-04-09 13:14               ` Michael Schnell
2010-04-09 13:32               ` Michael Schnell
2010-04-14 12:46       ` Michael Schnell
2010-04-14 12:57         ` Alan Cox [this message]
2010-04-14 14:38           ` Michael Schnell
2010-04-09  1:36 ` Mike Frysinger
2010-04-09  9:23   ` Michael Schnell

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