Re: [PATCH] move xchg/cmpxchg to atomic.h

Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 2 Jan 2001 17:18:52 +0000 (GMT)


> > We really can't. We _only_ have load-and-zero. And it has to be 16-byte
> > aligned. xchg() is just not something the CPU implements.
>
> The network code relies on the reader-xchg semantics David described in
> several places.

I guess the network code will just have to change for 2.5. read_xchg_val()
can be a null macro for everyone else at least

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