At Mon, 25 Aug 2008 00:37:52 +0200, Rene Herman wrote: > > On 24-08-08 21:48, Krzysztof Helt wrote: > > >From the Documentation/memory-barriers.txt > > " > > (*) inX(), outX(): > > ... > > They are guaranteed to be fully ordered with respect to each other. > > > > They are not guaranteed to be fully ordered with respect to other types of > > memory and I/O operation. > > ... > > " > > > > No barriers are needed in this case. > > On x86 certainly not and I would expect these barriers are there for > cases/architectures where inb() and outb() are redefined to memory > mapped I/O or there would just be no point at all. These barriers are mostly for Alpha. Not sure whether they are really needed, though. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
