Re: [PATCH] only irq-safe atomic ops

yodaiken
2002-02-24T01:07:28Z

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