rcu: Remove comment referring to __stop_machine()

Although it used to be that CPU_DYING notifiers executed on the outgoing
CPU with interrupts disabled and with all other CPUs spinning, this is
no longer the case.  This commit therefore removes this obsolete comment.

Signed-off-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index b2fc234ba1b9686981dfa65122a189c324a2c0a8..71df6f9f5ce6ad42950bcbbfa52ea3959ef4f406 100644 (file)
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -2931,11 +2931,6 @@ static int __cpuinit rcu_cpu_notify(struct notifier_block *self,
                break;
        case CPU_DYING:
        case CPU_DYING_FROZEN:
-               /*
-                * The whole machine is "stopped" except this CPU, so we can
-                * touch any data without introducing corruption. We send the
-                * dying CPU's callbacks to an arbitrarily chosen online CPU.
-                */
                for_each_rcu_flavor(rsp)
                        rcu_cleanup_dying_cpu(rsp);
                rcu_cleanup_after_idle(cpu);