Messages in this thread | | | Date | Wed, 30 Sep 2009 19:40:14 +0200 | From | Stefan Richter <> | Subject | Re: Linux 2.6.32-rc1 |
| |
Linus Torvalds wrote: > On Wed, 30 Sep 2009, Stefan Richter wrote: >> As long as it can't be turned into an atomic access, shouldn't cmpxchg64 >> be hidden from the common kernel coder? Almost everybody will assume >> that it is an atomic operation and happily use it in unsafe places. > > But it _is_ atomic. We don't support SMP on the platforms that we have to > do it with emulation on. > > There's a theoretical problem with NMI, but it's not one we can solve or > that is really all that interesting, so might as well ignore it.
Ah, right, I could have taken a hint from /* disable interrupts */ in Arjan's cmpxchg8b_emu. -- Stefan Richter -=====-==--= =--= ====- http://arcgraph.de/sr/
| |