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>

1 files changed, 0 insertions, 5 deletions

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index b2fc234ba1b9..71df6f9f5ce6 100644
--- 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);