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Commit ad853b48 authored by Tejun Heo's avatar Tejun Heo Committed by Linus Torvalds
Browse files

rcu: use %*pb[l] to print bitmaps including cpumasks and nodemasks 



printk and friends can now format bitmaps using '%*pb[l]'.  cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e8e6d97c

kernel/rcu/tree_plugin.h

+2 −3
Original line number Diff line number Diff line
@@ -49,7 +49,6 @@ DEFINE_PER_CPU(char, rcu_cpu_has_work); 
static cpumask_var_t rcu_nocb_mask; /* CPUs to have callbacks offloaded. */

static bool have_rcu_nocb_mask;	    /* Was rcu_nocb_mask allocated? */

static bool __read_mostly rcu_nocb_poll;    /* Offload kthread are to poll. */

static char __initdata nocb_buf[NR_CPUS * 5];

#endif /* #ifdef CONFIG_RCU_NOCB_CPU */



/*
@@ -2386,8 +2385,8 @@ void __init rcu_init_nohz(void) 
		cpumask_and(rcu_nocb_mask, cpu_possible_mask,

			    rcu_nocb_mask);

	}

	cpulist_scnprintf(nocb_buf, sizeof(nocb_buf), rcu_nocb_mask);

	pr_info("\tOffload RCU callbacks from CPUs: %s.\n", nocb_buf);

	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");