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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-07-03 17:22:34 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-30 16:03:11 -0700 |
| commit | 6dbfdc1409cf07accf7c97475c3b58d46daa319b (patch) | |
| tree | 8a53bc548a2573971707d2fa63e9365894b5c1f1 /kernel/rcu | |
| parent | 81ab59a3ad8656620d7106e855085bc12dc13a4c (diff) | |
| download | linux-6dbfdc1409cf07accf7c97475c3b58d46daa319b.tar.gz | |
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@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.h | 4 | ||||
| -rw-r--r-- | 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 */ |