[PATCH tip/core/rcu 21/26] rcu: grplo/grphi just records CPU number

paulmck
2020-06-23T00:22:39Z

From: Wei Yang <richard.weiyang@linux.alibaba.com>

We store lowest and highest CPU number belongs to a rcu_node, which is
not the group number.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/tree.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h
index 09ec93b..9f903f5 100644
--- a/kernel/rcu/tree.h
+++ b/kernel/rcu/tree.h
@@ -73,8 +73,8 @@ struct rcu_node {
unsigned long ffmask; /* Fully functional CPUs. */
unsigned long grpmask; /* Mask to apply to parent qsmask. */
/* Only one bit will be set in this mask. */
- int grplo; /* lowest-numbered CPU or group here. */
- int grphi; /* highest-numbered CPU or group here. */
+ int grplo; /* lowest-numbered CPU here. */
+ int grphi; /* highest-numbered CPU here. */
u8 grpnum; /* CPU/group number for next level up. */
u8 level; /* root is at level 0. */
bool wait_blkd_tasks;/* Necessary to wait for blocked tasks to */
--
2.9.5