Messages in this thread | | | Date | Fri, 7 Jul 2017 10:06:21 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH v2 0/9] Remove spin_unlock_wait() |
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* Peter Zijlstra <peterz@infradead.org> wrote:
> > It might even be that this is the defined semantics of spin_unlock_wait(). > > As is, spin_unlock_wait() is somewhat ill defined. IIRC it grew from an > optimization by Oleg and subsequently got used elsewhere. And it being the > subtle bugger it is, there were bugs.
I believe the historical, original spin_unlock_wait() came from early SMP optimizations of the networking code - and then spread elsewhere, step by step. All but one of the networking uses went away since then - so I don't think there's any original usecase left.
Thanks,
Ingo
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