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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-10-31 14:09:23 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-01-06 11:02:46 -0800
commit96e92021d4fad8543d598b5e4926cb34fd40c4c4 (patch)
treecf8ba84276cff7ec0a625f50153b8fd178350735 /kernel/rcu
parenta8f4cbadfb5c5f7f5d9eef70821276a4e2e9289d (diff)
downloadop-kernel-dev-96e92021d4fad8543d598b5e4926cb34fd40c4c4.zip
op-kernel-dev-96e92021d4fad8543d598b5e4926cb34fd40c4c4.tar.gz
rcu: Make use of rcu_preempt_has_tasks()
Given that there is now arcu_preempt_has_tasks() function that checks to see if the ->blkd_tasks list is non-empty, this commit makes use of it. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/tree_plugin.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index d594da4..bcc6d91 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -540,7 +540,7 @@ static int rcu_print_task_stall(struct rcu_node *rnp)
static void rcu_preempt_check_blocked_tasks(struct rcu_node *rnp)
{
WARN_ON_ONCE(rcu_preempt_blocked_readers_cgp(rnp));
- if (!list_empty(&rnp->blkd_tasks))
+ if (rcu_preempt_has_tasks(rnp))
rnp->gp_tasks = rnp->blkd_tasks.next;
WARN_ON_ONCE(rnp->qsmask);
}
@@ -706,7 +706,7 @@ sync_rcu_preempt_exp_init(struct rcu_state *rsp, struct rcu_node *rnp)
raw_spin_lock_irqsave(&rnp->lock, flags);
smp_mb__after_unlock_lock();
- if (list_empty(&rnp->blkd_tasks)) {
+ if (!rcu_preempt_has_tasks(rnp)) {
raw_spin_unlock_irqrestore(&rnp->lock, flags);
} else {
rnp->exp_tasks = rnp->blkd_tasks.next;
@@ -985,7 +985,7 @@ void exit_rcu(void)
static void rcu_initiate_boost_trace(struct rcu_node *rnp)
{
- if (list_empty(&rnp->blkd_tasks))
+ if (!rcu_preempt_has_tasks(rnp))
rnp->n_balk_blkd_tasks++;
else if (rnp->exp_tasks == NULL && rnp->gp_tasks == NULL)
rnp->n_balk_exp_gp_tasks++;
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