Messages in this thread | | | From | David Howells <> | Subject | Re: [RFC 10/12] x86, rwsem: simplify __down_write | Date | Thu, 09 Jun 2016 15:40:58 +0100 |
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Peter Zijlstra <peterz@infradead.org> wrote:
> Blergh; so looking at more asm there's still a few tricks we cannot do. > So while overall size is down, some paths do end up more expensive. (It > typically boils down to creative use of condition flags, which is very > hard in C)
It can be done using ISO __atomic_fetch_add() and suchlike.
David
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