linux-kernel - Re: [PATCH 1/2] smp_call_function: don't use lock in call_function

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Message-ID: <48AE0A14.4090609@goop.org>
Date:	Thu, 21 Aug 2008 17:36:36 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Nick Piggin <nickpiggin@...oo.com.au>,
	Andi Kleen <andi@...stfloor.org>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [PATCH 1/2] smp_call_function: don't use lock in call_function_data

Jeremy Fitzhardinge wrote:
> There's no need for a lock in call_function_data, since it's only used
> to decrement-and-test a counter.  Use an atomic instead.

BTW, these two patches are against tip.git.

    J
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