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rcu: Remove rsp parameter from rcu_spawn_one_boost_kthread()

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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@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-07-03 17:22:34 -07:00
parent 81ab59a3ad
commit 6dbfdc1409
2 changed files with 6 additions and 11 deletions
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4
kernel/rcu/tree.h
View File

@ -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);

13
kernel/rcu/tree_plugin.h
View File

@ -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 */