On Mon, 27 Nov 2006, Pavel Machek wrote: > Hi! > > > > If frozen is atomic_t, do we need memory barrier? > > > > I think so. For example on x86-64 atomic_read() is just a read. > > I'm not sure, but for x86-64 barriers are nops, anyway, IIRC. atomic_read() does not include its own memory barrier. If you want one, you have to write it yourself. At least, that's how I interpret Documentation/atomic_ops.txt. Alan Stern
