smp: Document transitivity for memory barriers.
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 11 Feb 2011 00:54:50 +0000 (16:54 -0800)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 4 Mar 2011 16:05:49 +0000 (08:05 -0800)
Transitivity is guaranteed only for full memory barriers (smp_mb()).

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

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