Commit-ID: 6dbfdc1409cf07accf7c97475c3b58d46daa319b
Gitweb: https://git.kernel.org/tip/6dbfdc1409cf07accf7c97475c3b58d46daa319b
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 3 Jul 2018 17:22:34 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 30 Aug 2018 16:03:11 -0700
rcu: Remove rsp parameter from rcu_spawn_one_boost_kthread()
There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to RCU's
functions. This commit therefore removes the rsp parameter from
rcu_spawn_one_boost_kthread().
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
---
kernel/rcu/tree.h | 4 ----
kernel/rcu/tree_plugin.h | 13 ++++++-------
2 files changed, 6 insertions(+), 11 deletions(-)
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index ccdee6bd3919..dc1c337f6da9 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -463,10 +463,6 @@ static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags);
static void rcu_preempt_boost_start_gp(struct rcu_node *rnp);
static void invoke_rcu_callbacks_kthread(void);
static bool rcu_is_callbacks_kthread(void);
-#ifdef CONFIG_RCU_BOOST
-static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
- struct rcu_node *rnp);
-#endif /* #ifdef CONFIG_RCU_BOOST */
static void __init rcu_spawn_boost_kthreads(void);
static void rcu_prepare_kthreads(int cpu);
static void rcu_cleanup_after_idle(void);
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 9a3d30121815..9a6dea5fab86 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1290,21 +1290,20 @@ static void rcu_preempt_boost_start_gp(struct rcu_node *rnp)
* already exist. We only create this kthread for preemptible RCU.
* Returns zero if all is well, a negated errno otherwise.
*/
-static int rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
- struct rcu_node *rnp)
+static int rcu_spawn_one_boost_kthread(struct rcu_node *rnp)
{
- int rnp_index = rnp - &rsp->node[0];
+ int rnp_index = rnp - rcu_get_root();
unsigned long flags;
struct sched_param sp;
struct task_struct *t;
- if (&rcu_state != rsp)
+ if (!IS_ENABLED(CONFIG_PREEMPT_RCU))
return 0;
if (!rcu_scheduler_fully_active || rcu_rnp_online_cpus(rnp) == 0)
return 0;
- rsp->boost = 1;
+ rcu_state.boost = 1;
if (rnp->boost_kthread_task != NULL)
return 0;
t = kthread_create(rcu_boost_kthread, (void *)rnp,
@@ -1430,7 +1429,7 @@ static void __init rcu_spawn_boost_kthreads(void)
per_cpu(rcu_cpu_has_work, cpu) = 0;
BUG_ON(smpboot_register_percpu_thread(&rcu_cpu_thread_spec));
rcu_for_each_leaf_node(&rcu_state, rnp)
- (void)rcu_spawn_one_boost_kthread(&rcu_state, rnp);
+ (void)rcu_spawn_one_boost_kthread(rnp);
}
static void rcu_prepare_kthreads(int cpu)
@@ -1440,7 +1439,7 @@ static void rcu_prepare_kthreads(int cpu)
/* Fire up the incoming CPU's kthread and leaf rcu_node kthread. */
if (rcu_scheduler_fully_active)
- (void)rcu_spawn_one_boost_kthread(&rcu_state, rnp);
+ (void)rcu_spawn_one_boost_kthread(rnp);
}
#else /* #ifdef CONFIG_RCU_BOOST */
|