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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 <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-12-04 09:48:59 -08:00
parent a7c8655b07
commit 3016611eed
1 changed files with 5 additions and 2 deletions
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7
kernel/rcu/tree_plugin.h
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@ -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");