On Fri, 22 Apr 2016 11:04:32 +0200 Peter Zijlstra <[email protected]> wrote:
> Implement FETCH-OP atomic primitives, these are very similar to the > existing OP-RETURN primitives we already have, except they return the > value of the atomic variable _before_ modification. > > This is especially useful for irreversible operations -- such as > bitops (because it becomes impossible to reconstruct the state prior > to modification). > > Signed-off-by: Peter Zijlstra (Intel) <[email protected]> > --- > arch/s390/include/asm/atomic.h | 42 > +++++++++++++++++++++++++++++++---------- > 1 file changed, 32 insertions(+), 10 deletions(-) That looks good, the code compiles and the functions are generated correctly. We will know for sure if it works after the first user of these new functions hit the kernel. Acked-by: Martin Schwidefsky <[email protected]> -- blue skies, Martin. "Reality continues to ruin my life." - Calvin.
