linux-kernel - Re: [patch 00/23] Atomic operations updates: add cmpxchg

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Date:	Sun, 12 Aug 2007 11:03:20 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
To:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Cc:	Christoph Lameter <clameter@....com>
Subject: Re: [patch 00/23] Atomic operations updates: add cmpxchg_local

* Mathieu Desnoyers (mathieu.desnoyers@...ymtl.ca) wrote:
> Hi Andrew,
> 
> I have been asked for a cmpxchg_local implementation by Christoph Lameter so he
> can use it to accelerate the slub allocator.
> 
> On some architectures, where cmpxchg is nothing more that a simple save/restore
> interrupts surrounding the cmpxchg non atomic ops, I remove the code and make
> them use the new "generic" version.
> 
> cmpxchg_local and cmpxchg64_local are made available on all architectures in
> these patches. They use the best primitive known, either an atomic operation or
> save/restore interrupts.
> 

Forgot to mention: it applies on top of 2.6.23-rc2-mm2

series file:

#
# cmpxchg_local and cmpxchg64_local standardization
#
i386-cmpxchg64-80386-80486-fallback.patch
#
add-cmpxchg-local-to-generic-for-up.patch
add-cmpxchg-local-to-arm.patch
add-cmpxchg-local-to-avr32.patch
add-cmpxchg-local-to-blackfin.patch
add-cmpxchg-local-to-cris.patch
add-cmpxchg-local-to-frv.patch
add-cmpxchg-local-to-h8300.patch
add-cmpxchg-local-to-ia64.patch
add-cmpxchg-local-to-m32r.patch
fix-m32r-__xchg.patch
local_t_m32r_optimized.patch
add-cmpxchg-local-to-m68k.patch
add-cmpxchg-local-to-m68knommu.patch
add-cmpxchg-local-to-parisc.patch
add-cmpxchg-local-to-ppc.patch
add-cmpxchg-local-to-s390.patch
add-cmpxchg-local-to-sh.patch
add-cmpxchg-local-to-sh64.patch
add-cmpxchg-local-to-sparc.patch
add-cmpxchg-local-to-sparc64.patch
add-cmpxchg-local-to-v850.patch
add-cmpxchg-local-to-xtensa.patch

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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