Re: [PATCH 2/6] Blackfin Serial Driver: Add a debug function toserial driver.

[gyang]

Hi, Alan,

We are making a SMP like patch to blackfin, cpu_relax() is replaced by a
data cache flush function which will count it to a per-cpu counter.
If this serial function is called too early, the per-cpu data area have
not been initialized, this call will cause crash.
So we'd like to use barrier() instead of cpu_relax().

BRs,
Graf

在 2008-10-14二的 14:27 +0100，Alan Cox写道：
> > -		cpu_relax();
> > +		barrier();
> > +
> 
> Seems to be an odd unrelated change ?
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