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Date: Sat, 23 Feb 2002 18:05:21 -0700
From: yodaiken@fsmlabs.com
To: Andrew Morton <akpm@zip.com.au>
Cc: Robert Love <rml@tech9.net>, Roman Zippel <zippel@linux-m68k.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] only irq-safe atomic ops
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In-Reply-To: <3C782C34.2CC0E417@zip.com.au>; from akpm@zip.com.au on Sat, Feb 23, 2002 at 03:56:36PM -0800
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On Sat, Feb 23, 2002 at 03:56:36PM -0800, Andrew Morton wrote:
> Robert Love wrote:
> > 
> For the situation Victor described:
> 
> 	const int cpu = smp_get_cpuid();
> 
> 	per_cpu_array_foo[cpu] = per_cpu_array_bar[cpu] +
> 					per_cpu_array_zot[cpu];
> 
> 	smp_put_cpuid();
> 
> It's a nice interface - it says "pin down and return the current
> CPU ID".

Go for it! Only 900 odd calls to smp_processor_id in the kernel
source last time I checked.


-- 
---------------------------------------------------------
Victor Yodaiken 
Finite State Machine Labs: The RTLinux Company.
 www.fsmlabs.com  www.rtlinux.com

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