[PATCH 0/3] Add OMAP hardware spinlock misc driver

[Ohad Ben-Cohen]

On Mon, Oct 18, 2010 at 3:43 PM, Peter Zijlstra <peterz at infradead.org> wrote:
> Right, so the problem is that there simply is no way to do atomic memory
> access from these auxiliary processing units wrt the main CPU?

Yes. There are a few relevant system-wide limitations, one of them is
that simply the system interconnect does not support those fancy
atomic operations.