From: Russell King <rmk+lkml@arm.linux.org.uk>
To: "David S. Miller" <davem@davemloft.net>
Cc: nickpiggin@yahoo.com.au, zippel@linux-m68k.org,
Linux-Kernel@vger.kernel.org, dipankar@in.ibm.com
Subject: Re: [PATCH 5/5] remove HAVE_ARCH_CMPXCHG
Date: Thu, 15 Sep 2005 08:10:09 +0100 [thread overview]
Message-ID: <20050915081009.A3739@flint.arm.linux.org.uk> (raw)
In-Reply-To: <20050914.152610.15194310.davem@davemloft.net>; from davem@davemloft.net on Wed, Sep 14, 2005 at 03:26:10PM -0700
On Wed, Sep 14, 2005 at 03:26:10PM -0700, David S. Miller wrote:
> From: Russell King <rmk+lkml@arm.linux.org.uk>
> Date: Wed, 14 Sep 2005 23:03:53 +0100
>
> > What business has userspace got of telling whether cmpxchg works on
> > an architecture by looking at kernel headers?
>
> Russell, please don't fly off the handle like this.
Sigh, I wasn't. I was making a valid point. Maybe if you read the
bit I quoted you'd have realised that, which was:
> I think userspace synchronization may be quite a valid use of
^^^^^^^^^
> atomic cmpxchg, but Kconfig is a far better place to do it than
> testing HAVE_ARCH_CMPXCHG.
But maybe I'm not capable of interpreting the above english? To
me at least it's definitely talking about user space, not kernel
space.
--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
next prev parent reply other threads:[~2005-09-15 7:10 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-14 14:48 [PATCH 1/5] atomic: introduce atomic_cmpxchg Nick Piggin
2005-09-14 14:49 ` [PATCH 2/5] atomic: introduce atomic_inc_not_zero Nick Piggin
2005-09-14 14:51 ` [PATCH 3/5] rcu file: use atomic primitives Nick Piggin
2005-09-14 14:55 ` [PATCH 4/5] atomic: dec_and_lock use cmpxchg Nick Piggin
2005-09-14 15:01 ` [PATCH 5/5] remove HAVE_ARCH_CMPXCHG Nick Piggin
2005-09-14 16:31 ` Roman Zippel
2005-09-14 16:49 ` Nick Piggin
2005-09-14 17:59 ` David S. Miller
2005-09-14 22:03 ` Russell King
2005-09-14 22:26 ` David S. Miller
2005-09-15 7:10 ` Russell King [this message]
2005-09-15 13:08 ` Alan Cox
2005-09-14 15:20 ` [PATCH 4/5] atomic: dec_and_lock use cmpxchg Nick Piggin
2005-09-14 16:24 ` David S. Miller
2005-09-14 16:52 ` Nick Piggin
2005-09-17 0:05 ` David S. Miller
2005-09-14 16:16 ` [PATCH 2/5] atomic: introduce atomic_inc_not_zero Roman Zippel
2005-09-14 16:44 ` Nick Piggin
2005-09-14 17:04 ` Nick Piggin
2005-09-14 17:18 ` Roman Zippel
2005-09-14 22:00 ` Russell King
2005-09-14 22:10 ` Roman Zippel
2005-09-14 22:21 ` Russell King
2005-09-15 1:51 ` Nick Piggin
2005-09-17 1:15 ` Roman Zippel
2005-09-17 6:36 ` Andrew Morton
2005-09-17 10:01 ` Roman Zippel
2005-09-17 7:19 ` David S. Miller
2005-09-17 7:34 ` Dipankar Sarma
2005-09-18 8:08 ` Nick Piggin
2005-09-17 0:59 ` Roman Zippel
2005-09-17 7:18 ` David S. Miller
2005-09-17 7:27 ` Russell King
2005-09-18 6:03 ` David S. Miller
2005-09-14 15:17 ` [PATCH 1/5] atomic: introduce atomic_cmpxchg Russell King
2005-09-14 15:22 ` Nick Piggin
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