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Because READ_ONCE() now implies smp_read_barrier_depends(), this commit removes the now-redundant smp_read_barrier_depends() following the READ_ONCE() in __ref_is_percpu(). Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Tejun Heo <tj@kernel.org> Cc: Christoph Lameter <cl@linux.com>