On Mon, Jul 27, 2015 at 06:30:05PM +0200, Peter Zijlstra wrote: > On Mon, Jul 27, 2015 at 12:47:14PM +0200, Peter Zijlstra wrote: > > @@ -68,13 +63,8 @@ void static_key_slow_inc(struct static_k > > return; > > > > jump_label_lock(); > > + if (atomic_inc_and_test(&key->enabled)) > > atomic_inc_return() == 1, works _much_ better.
Confirmed. With this change, the jump_label_init() patch, plus the changes in s390 inline asm everything works for me. There are a couple of places in s390 code where the DEFINE_STATIC_KEY_FALSE and static_branch_likely() combination would make sense. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
