Hello, On Thu, Sep 22, 2016 at 02:35:00PM +1000, Nicholas Piggin wrote: > Well thank you, how about you? Heh, can't complain. Hope to see you around sometime. It's been forever. > Trying a new mail client, sorry. It *seems* to be working now, how's > this? Hmm... Still encoded. > From d0cb9052d6f4c31d24f999b7b0cecb34681eee9b Mon Sep 17 00:00:00 2001 > From: Nicholas Piggin <npiggin@xxxxxxxxx> > Date: Wed, 21 Sep 2016 18:23:43 +1000 > Subject: [PATCH] percpu: improve generic percpu modify-return implementations > > Some architectures require an additional load to find the address of > percpu pointers. In some implemenatations, the C aliasing rules do not > allow the result of that load to be kept over the store that modifies > the percpu variable, which causes additional loads. > > Work around this by finding the pointer first, then operating on that. > > It's also possible to mark things as restrict and those kind of games, > but that can require larger and arch specific changes. QP-decoded and applied to percpu/for-4.9. Thanks. -- tejun -- 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
