rcu: Rename rcu_check_callbacks() to rcu_sched_clock_irq()

[platform/kernel/linux-rpi.git] / kernel / rcu / tree.c

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 1c4add0..874054b 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1139,7 +1139,7 @@ static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
        }
 
        /*
-        * NO_HZ_FULL CPUs can run in-kernel without rcu_check_callbacks!
+        * NO_HZ_FULL CPUs can run in-kernel without rcu_sched_clock_irq!
         * The above code handles this, but only for straight cond_resched().
         * And some in-kernel loops check need_resched() before calling
         * cond_resched(), which defeats the above code for CPUs that are
@@ -2532,14 +2532,14 @@ static void rcu_do_batch(struct rcu_data *rdp)
 }
 
 /*
- * Check to see if this CPU is in a non-context-switch quiescent state
- * (user mode or idle loop for rcu, non-softirq execution for rcu_bh).
- * Also schedule RCU core processing.
- *
- * This function must be called from hardirq context.  It is normally
- * invoked from the scheduling-clock interrupt.
+ * This function is invoked from each scheduling-clock interrupt,
+ * and checks to see if this CPU is in a non-context-switch quiescent
+ * state, for example, user mode or idle loop.  It also schedules RCU
+ * core processing.  If the current grace period has gone on too long,
+ * it will ask the scheduler to manufacture a context switch for the sole
+ * purpose of providing a providing the needed quiescent state.
  */
-void rcu_check_callbacks(int user)
+void rcu_sched_clock_irq(int user)
 {
        trace_rcu_utilization(TPS("Start scheduler-tick"));
        raw_cpu_inc(rcu_data.ticks_this_gp);
@@ -2552,7 +2552,7 @@ void rcu_check_callbacks(int user)
                }
                __this_cpu_write(rcu_data.rcu_urgent_qs, false);
        }
-       rcu_flavor_check_callbacks(user);
+       rcu_flavor_sched_clock_irq(user);
        if (rcu_pending())
                invoke_rcu_core();