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Subject[PATCH 3/4] rcu: grpnum just records group number
Date
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>
---
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 ce9ab7371706..512829eed545 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 */
--
2.20.1 (Apple Git-117)
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