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        Wei Yang <richard.weiyang@linux.alibaba.com>,
        "Paul E . McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 22/26] rcu: grpnum just records group number
Date:   Mon, 22 Jun 2020 17:21:43 -0700
Message-Id: <20200623002147.25750-22-paulmck@kernel.org>
In-Reply-To: <20200623002128.GA25456@paulmck-ThinkPad-P72>
References: <20200623002128.GA25456@paulmck-ThinkPad-P72>
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From: Wei Yang <richard.weiyang@linux.alibaba.com>

grpnum in rcu_node means the position in its parent, which is not the
CPU number even in last level.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 kernel/rcu/tree.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 9f903f5..c96ae35 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -75,7 +75,7 @@ struct rcu_node {
 				/*  Only one bit will be set in this mask. */
 	int	grplo;		/* lowest-numbered CPU here. */
 	int	grphi;		/* highest-numbered CPU here. */
-	u8	grpnum;		/* CPU/group number for next level up. */
+	u8	grpnum;		/* group number for next level up. */
 	u8	level;		/* root is at level 0. */
 	bool	wait_blkd_tasks;/* Necessary to wait for blocked tasks to */
 				/*  exit RCU read-side critical sections */
-- 
2.9.5