Re: [PATCH 03/12] hdaps: Unify and cache hdaps readouts
From: Pavel Machek
Date: Tue Aug 08 2006 - 06:07:45 EST
> > /* Parse position data: */
> > x = *(s16*)(data.val+EC_ACCEL_IDX_XPOS1);
> > y = *(s16*)(data.val+EC_ACCEL_IDX_YPOS1);
> > transform_axes(&x, &y);
> >...which looks even better to me.
> Yes, that's elegant.
> But it made me realize there's a race condition here (and and also in
> the mainline driver): the global pos_x, rest_x etc. could be updated
> while an attribute's show_* function is called. Ugh. I guess I need to
> sprinkle spinlocks all over the place.
They are simple integers... so yes, locking is needed, but I'd not
label it as critical. I guess you should get your series done, first.
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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