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Paul E. McKenney authored
The memory-barriers.txt document contains an obsolete passage stating that smp_read_barrier_depends() is required to force ordering for read-to-write dependencies. We now know that this is not required, even for DEC Alpha. This commit therefore updates this passage to state that read-to-write dependencies are respected even without smp_read_barrier_depends(). Reported-by:
Lance Roy <ldr709@gmail.com> Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: David Howells <dhowells@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Andrea Parri <parri.andrea@gmail.com> Cc: Jade Alglave <j.alglave@ucl.ac.uk> Cc: Luc Maranget <luc.maranget@inria.fr> [ paulmck: Reference control-dependencies sections and use WRITE_ONCE() per Will Deacon. Correctly place split-cache paragraph while there. ] Acked-by:
Will Deacon <will.deacon@arm.com>
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