On Tue, May 31, 2016 at 12:19:25PM +0200, Peter Zijlstra wrote: > As there have been a few requests for atomic_fetch_$op primitives and recently > by Linus, I figured I'd go and implement the lot. > > The atomic_fetch_$op differs from the existing atomic_$op_return we already > have by returning the old value instead of the new value. This is especially > useful when the operation is irreversible (like bitops), and allows for things > like test-and-set. > > This version incorporates all feedback from last time and is now complete > thanks > to Will implementing ARMv8.1-LSE versions. > > No known build breakage from the build-bot. > > Notes: > - arc asm/atomic.h is a bit of a mess after the eznps merge, I would > recommend a restructure or split of that file, but could not find > the will to do it. > - arc, metag and tile could convert to _relaxed. > > I'm aiming to merge this for v4.8 which should get this a fair few weeks in > -next.
Thanks Peter, the arm/arm64 bits all look good to me. Will
