From: Paul E. McKenney <paulmck@kernel.org>
Date: Fri, 30 Jul 2021 03:30:32 +0000 (-0700)
Subject: rcu: Make rcutree_dying_cpu() use its "cpu" parameter
X-Git-Tag: v6.1-rc5~2772^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4aa846f97c0c0d9740d120f9ac3e2fba1522ac0c;p=platform%2Fkernel%2Flinux-starfive.git

rcu: Make rcutree_dying_cpu() use its "cpu" parameter

The CPU-hotplug functions take a "cpu" parameter, but rcutree_dying_cpu()
ignores it in favor of this_cpu_ptr().  This works at the moment, but
it would be better to be consistent.  This might also work better given
some possible future changes.  This commit therefore uses per_cpu_ptr()
to avoid ignoring the rcutree_dying_cpu() function's argument.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index dc29684..6a1e9d3 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2356,7 +2356,7 @@ rcu_check_quiescent_state(struct rcu_data *rdp)
 int rcutree_dying_cpu(unsigned int cpu)
 {
 	bool blkd;
-	struct rcu_data *rdp = this_cpu_ptr(&rcu_data);
+	struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu);
 	struct rcu_node *rnp = rdp->mynode;
 
 	if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))