On 06/02/2014 12:30 PM, Peter Zijlstra wrote:
On Mon, Jun 02, 2014 at 06:25:25PM +0200, Peter Zijlstra wrote:
I'm almost inclined to just exclude parisc from using opt spinning.
That said, this patch still doesn't address the far more interesting
problem of actually finding these issues for these few weird archs.
So why do these archs provide xchg() and cmpxchg() at all? Wouldn't it
be much simpler if archs that cannot sanely do this, not provide these
primitives at all?
I believe xchg() and cmpxchg() are used in quite a number of places
within the generic kernel code. So kernel compilation will fail if those
APIs aren't provided by an architecture.
-Longman
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