On Thu, Apr 16, 2015 at 05:00:02AM -0400, Peter Hurley wrote: > On 04/16/2015 02:39 AM, Mario Kleiner wrote: > > I think i'm still not getting something about why the compiler would > > be allowed to reorder in this way in absence of the additional > > smp_rmb? Or is that barrier required for other archs which are less > > strongly ordered? > > Apologies for the confusion; I missed that it was data-dependent load.
Oh right missed that too. Well, alpha can do anything, we'd need at least a read_barrier_depends(); here. Tbh not sure that's worth it since with the plain smp_rmb() we match the seqlock code exactly. -Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
