Re: [PATCH] only irq-safe atomic ops

From: yodaiken@fsmlabs.com
Date: Sat Feb 23 2002 - 20:05:21 EST


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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