time: 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: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 9 deletions

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 1363d58f07e9..a4c4edac4528 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -326,13 +326,6 @@ static int tick_nohz_cpu_down_callback(struct notifier_block *nfb,
         return NOTIFY_OK;
 }
 
-/*
- * Worst case string length in chunks of CPU range seems 2 steps
- * separations: 0,2,4,6,...
- * This is NR_CPUS + sizeof('\0')
- */
-static char __initdata nohz_full_buf[NR_CPUS + 1];
-
 static int tick_nohz_init_all(void)
 {
         int err = -1;
@@ -393,8 +386,8 @@ void __init tick_nohz_init(void)
                 context_tracking_cpu_set(cpu);
 
         cpu_notifier(tick_nohz_cpu_down_callback, 0);
-        cpulist_scnprintf(nohz_full_buf, sizeof(nohz_full_buf), tick_nohz_full_mask);
-        pr_info("NO_HZ: Full dynticks CPUs: %s.\n", nohz_full_buf);
+        pr_info("NO_HZ: Full dynticks CPUs: %*pbl.\n",
+                cpumask_pr_args(tick_nohz_full_mask));
 }
 #endif