Commit 6dbfdc14 authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 81ab59a3

kernel/rcu/tree.h

+0 −4
Original line number Diff line number Diff line
@@ -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);

kernel/rcu/tree_plugin.h

+6 −7
Original line number Diff line number Diff line
@@ -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 */