rcu: Rename and comment changes due to only one rcuo kthread per CPU

Given RCU flavor consolidation, the name rcu_spawn_all_nocb_kthreads()
is quite misleading.  It no longer ever creates more than one kthread,
and it does so only for the specified CPU.  This commit therefore changes
this name to the more descriptive rcu_spawn_cpu_nocb_kthread(), and also
fixes up a similar issue in its header comment while in the area.

Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 9180158756d2c2c65641c5c1700e0b2adfe25301..f4edc664fb6554a6a83e9ca1092a107f75c91850 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3299,7 +3299,7 @@ int rcutree_prepare_cpu(unsigned int cpu)
        trace_rcu_grace_period(rcu_state.name, rdp->gp_seq, TPS("cpuonl"));
        raw_spin_unlock_irqrestore_rcu_node(rnp, flags);
        rcu_prepare_kthreads(cpu);
-       rcu_spawn_all_nocb_kthreads(cpu);
+       rcu_spawn_cpu_nocb_kthread(cpu);
 
        return 0;
 }

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index d90b02b53c0ec4f6bdad4c66f52ee2b2cbc63018..bcfd684a5c57ab03824321766be7ed8cb9de4a84 100644 (file)
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -451,7 +451,7 @@ static bool rcu_nocb_adopt_orphan_cbs(struct rcu_data *my_rdp,
 static int rcu_nocb_need_deferred_wakeup(struct rcu_data *rdp);
 static void do_nocb_deferred_wakeup(struct rcu_data *rdp);
 static void rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp);
-static void rcu_spawn_all_nocb_kthreads(int cpu);
+static void rcu_spawn_cpu_nocb_kthread(int cpu);
 static void __init rcu_spawn_nocb_kthreads(void);
 #ifdef CONFIG_RCU_NOCB_CPU
 static void __init rcu_organize_nocb_kthreads(void);

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 1b3dd2fc0cd64b7004a8f1fbad857617fa7fb0f7..4d4091565a2c5d686b0c0f9565ebcc54f6bc8466 100644 (file)
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -2517,9 +2517,9 @@ static void rcu_spawn_one_nocb_kthread(int cpu)
 
 /*
  * If the specified CPU is a no-CBs CPU that does not already have its
- * rcuo kthreads, spawn them.
+ * rcuo kthread, spawn it.
  */
-static void rcu_spawn_all_nocb_kthreads(int cpu)
+static void rcu_spawn_cpu_nocb_kthread(int cpu)
 {
        if (rcu_scheduler_fully_active)
                rcu_spawn_one_nocb_kthread(cpu);
@@ -2536,7 +2536,7 @@ static void __init rcu_spawn_nocb_kthreads(void)
        int cpu;
 
        for_each_online_cpu(cpu)
-               rcu_spawn_all_nocb_kthreads(cpu);
+               rcu_spawn_cpu_nocb_kthread(cpu);
 }
 
 /* How many follower CPU IDs per leader?  Default of -1 for sqrt(nr_cpu_ids). */
@@ -2670,7 +2670,7 @@ static void do_nocb_deferred_wakeup(struct rcu_data *rdp)
 {
 }
 
-static void rcu_spawn_all_nocb_kthreads(int cpu)
+static void rcu_spawn_cpu_nocb_kthread(int cpu)
 {
 }