Messages in this thread | | | Date | Tue, 28 Oct 2014 01:12:14 +0000 | From | Al Viro <> | Subject | Re: [GIT PULL] overlay filesystem v25 |
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On Mon, Oct 27, 2014 at 10:36:21AM -0700, Paul E. McKenney wrote: > Code making direct use of smp_read_barrier_depends() is harder to read, > in my experience, but good point on the sparse noise. Maybe a new > lockless_dereference() primitive? Maybe something like the following? > (Untested, probably does not even build.) > > #define lockless_dereference(p) \ > ({ \ > typeof(*p) *_________p1 = ACCESS_ONCE(p); \ > smp_read_barrier_depends(); /* Dependency order vs. p above. */ \ > _________p1; \ > })
Hmm... Where would you prefer to put it? rcupdate.h?
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