Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 07/14] rcu: Make use of rcu_preempt_has_tasks() | Date | Wed, 7 Jan 2015 09:32:26 -0800 |
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From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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> --- kernel/rcu/tree_plugin.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index d594da48f4b4..bcc6d9134d47 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++; -- 1.8.1.5
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