From 3016611eedaff3e75feba54392c105db214a4f52 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Mon, 4 Dec 2017 09:48:59 -0800 Subject: [PATCH] rcu: Fix CPU offload boot message when no CPUs are offloaded In CONFIG_RCU_NOCB_CPU=y kernels, if the boot parameters indicate that none of the CPUs should in fact be offloaded, the following somewhat obtuse message appears: Offload RCU callbacks from CPUs: . This commit therefore makes the message at least grammatically correct in this case: Offload RCU callbacks from CPUs: (none) Signed-off-by: Paul E. McKenney --- kernel/rcu/tree_plugin.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index fb88a028deec..93f5649ffd2b 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2312,8 +2312,11 @@ void __init rcu_init_nohz(void) cpumask_and(rcu_nocb_mask, cpu_possible_mask, rcu_nocb_mask); } - pr_info("\tOffload RCU callbacks from CPUs: %*pbl.\n", - cpumask_pr_args(rcu_nocb_mask)); + if (cpumask_empty(rcu_nocb_mask)) + pr_info("\tOffload RCU callbacks from CPUs: (none).\n"); + else + pr_info("\tOffload RCU callbacks from CPUs: %*pbl.\n", + cpumask_pr_args(rcu_nocb_mask)); if (rcu_nocb_poll) pr_info("\tPoll for callbacks from no-CBs CPUs.\n");