On Wed, Aug 12, 2015 at 02:44:15PM +0100, Will Deacon wrote: > Hello Paul, > > On Fri, Jul 24, 2015 at 04:30:46PM +0100, Paul E. McKenney wrote: > > On Fri, Jul 24, 2015 at 12:31:01PM +0100, Will Deacon wrote: > > > On Wed, Jul 15, 2015 at 02:12:21PM +0100, Paul E. McKenney wrote: > > > > > > commit 695c05d4b9666c50b40a1c022678b5f6e2e3e771 > > > > > > Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > > > > > > Date: Tue Jul 14 18:35:23 2015 -0700 > > > > > > > > > > > > rcu,locking: Privatize smp_mb__after_unlock_lock() > > > > > > > > > > > > RCU is the only thing that uses smp_mb__after_unlock_lock(), and is > > > > > > likely the only thing that ever will use it, so this commit makes this > > > > > > macro private to RCU. > > > > > > > > > > > > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > > > > > > Cc: Will Deacon <will.deacon@xxxxxxx> > > > > > > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > > > > > Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> > > > > > > Cc: "linux-arch@xxxxxxxxxxxxxxx" <linux-arch@xxxxxxxxxxxxxxx> > > > > > > Are you planning to queue this somewhere? I think it makes sense regardless > > > of whether we change PowerPc or not and ideally it would be merged around > > > the same time as my relaxed atomics series. > > > > I have is in -rcu. By default, I will push it to the 4.4 merge window. > > Please let me know if you need it sooner. > > The generic relaxed atomics are now queued in -tip, so it would be really > good to see this Documentation update land in 4.3 if at all possible. I > appreciate it's late in the cycle, but it's always worth asking. Can't hurt to give it a try. I have set -rcu's rcu/next branch to this commit, and if it passes a few day's worth of testing, I will see what Ingo has to say about a pull request. This commit also privatizes smp_mb__after_unlock_lock() as well as updating documentation. Looks like we need to strengthen powerpc's locking primitives, then get rid of smp_mb__after_unlock_lock() entirely. Or did that already happen and I just missed it? Thanx, Paul -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
