[PATCH] RCU: fix a typo in comments of rcu_blocking_is_gp

[Zhouyi Zhou <zhouzhouyi@gmail.com>]

There is a tiny typo in comment of function rcu_blocking_is_gp.

Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
---
 kernel/rcu/tree.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index f78ee75..4cca03f 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3512,7 +3512,7 @@ void __init kfree_rcu_scheduler_running(void)
  * During early boot, any blocking grace-period wait automatically
  * implies a grace period.  Later on, this is never the case for PREEMPTION.
  *
- * Howevr, because a context switch is a grace period for !PREEMPTION, any
+ * However, because a context switch is a grace period for !PREEMPTION, any
  * blocking grace-period wait automatically implies a grace period if
  * there is only one CPU online at any point time during execution of
  * either synchronize_rcu() or synchronize_rcu_expedited().  It is OK to
-- 
1.7.1