rcu_read_delay
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
.read_delay = rcu_read_delay,
.read_delay = rcu_read_delay, /* just reuse rcu's version. */
rcu_read_delay(rrsp, rtrsp);
.read_delay = rcu_read_delay,