On Wed, Jan 27, 2016 at 02:57:07PM +0000, David Howells wrote: > Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > +========== > > +DISCLAIMER > > +========== > > + > > +This document is not a specification; it is intentionally (for the sake of > > +brevity) and unintentionally (due to being human) incomplete. This document is > > +meant as a guide to using the various memory barriers provided by Linux, but > > +in case of any doubt (and there are many) please ask. > > + > > +I repeat, this document is not a specification of what Linux expects from > > +hardware. > > The purpose of this document is twofold: > > (1) to specify the minimum functionality that one can rely on for any > particular barrier, and > > (2) to provide a guide as to how to use the barriers that are available. > > Note that an architecture can provide more than the minimum requirement for > any particular barrier, but if the barrier provides less than that, it is > incorrect. > > Note also that it is possible that a barrier may be a no-op for an > architecture because the way that arch works renders an explicit barrier > unnecessary in that case. > > > + > > Can you bung an extra blank line in here if you have to redo this at all? > > > +======== > > +CONTENTS > > +======== > > > > (*) Abstract memory access model. Good point! Would you be willing to add a Signed-off-by so I can take the combined change, assuming Peter and Will are good with it? Thanx, Paul
