Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] WorkStruct: Implement generic UP cmpxchg() where an arch doesn't support it | Date | Wed, 06 Dec 2006 19:45:40 +0000 |
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Linus Torvalds <torvalds@osdl.org> wrote:
> Also, I don't see quite why you think "cmpxchg()" and "atomic_cmpxchg()" > would be different. ANY cmpxchg() needs to be atomic - if it's not, > there's no point to the operation at all, since you'd just write it as
It's not that atomic_cmpxchg() is different to cmpxchg(), it's that atomic_set() is different to direct assignment.
atomic_set() on PA-RISC, for example, has spinlocks in it.
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