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rcu: Simplify sync_rcu_preempt_exp_init()

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This commit eliminates a boolean and associated "if" statement by
rearranging the code.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney
2015-01-19 16:56:46 -08:00
parent 78043c467a
commit c8aead6a9b
1 changed files with 1 additions and 4 deletions
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5
kernel/rcu/tree_plugin.h
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@@ -677,19 +677,16 @@ static void
sync_rcu_preempt_exp_init(struct rcu_state *rsp, struct rcu_node *rnp) sync_rcu_preempt_exp_init(struct rcu_state *rsp, struct rcu_node *rnp)
{ {
unsigned long flags; unsigned long flags;
int must_wait = 0;
raw_spin_lock_irqsave(&rnp->lock, flags); raw_spin_lock_irqsave(&rnp->lock, flags);
smp_mb__after_unlock_lock(); smp_mb__after_unlock_lock();
if (!rcu_preempt_has_tasks(rnp)) { if (!rcu_preempt_has_tasks(rnp)) {
raw_spin_unlock_irqrestore(&rnp->lock, flags); raw_spin_unlock_irqrestore(&rnp->lock, flags);
rcu_report_exp_rnp(rsp, rnp, false); /* No tasks, report. */
} else { } else {
rnp->exp_tasks = rnp->blkd_tasks.next; rnp->exp_tasks = rnp->blkd_tasks.next;
rcu_initiate_boost(rnp, flags); /* releases rnp->lock */ rcu_initiate_boost(rnp, flags); /* releases rnp->lock */
must_wait = 1;
} }
if (!must_wait)
rcu_report_exp_rnp(rsp, rnp, false); /* Don't wake self. */
} }
/** /**