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rcu: Consolidate expedited GP code into rcu_exp_wait_wake()

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Currently, synchronize_rcu_expedited() and rcu_sched_expedited() have
significant duplicate code.  This commit therefore consolidates some of
this code into rcu_exp_wake(), which is now renamed to rcu_exp_wait_wake()
in recognition of its added responsibilities.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2016-03-16 16:22:25 -07:00
parent 356051e1de
commit 4ea3e85b11
2 changed files with 11 additions and 17 deletions
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kernel/rcu/tree_plugin.h
+2 -8
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@@ -759,14 +759,8 @@ void synchronize_rcu_expedited(void)
/* Initialize the rcu_node tree in preparation for the wait. */
sync_rcu_exp_select_cpus(rsp, sync_rcu_exp_handler);
/* Wait for snapshotted ->blkd_tasks lists to drain. */
synchronize_sched_expedited_wait(rsp);
rcu_exp_gp_seq_end(rsp);
trace_rcu_exp_grace_period(rsp->name, s, TPS("end"));
rcu_exp_wake(rsp, s);
trace_rcu_exp_grace_period(rsp->name, s, TPS("endwake"));
mutex_unlock(&rsp->exp_mutex);
/* Wait for ->blkd_tasks lists to drain, then wake everyone up. */
rcu_exp_wait_wake(rsp, s);
}
EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);