On Mon, Dec 13, 2010 at 08:50:32PM -0800, Jeff Ohlstein wrote:
> +static inline void platform_do_lowpower(unsigned int cpu)
> +{
> + /* Just enter wfe for now. */
> + for (;;) {
> + asm("wfe" : : : "memory");
> + if (pen_release == cpu) {
> + /*
> + * OK, proper wakeup, we're done
> + */
> + break;
> + }
> + smp_rmb();
I can't work out what this read memory barrier is doing here. Could you
suggest what purpose it's serving please?
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