workqueue: use %*pb[l] to format 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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index beeeac9..f288493 100644 (file)
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3083,10 +3083,9 @@ static ssize_t wq_cpumask_show(struct device *dev,
        int written;
 
        mutex_lock(&wq->mutex);
-       written = cpumask_scnprintf(buf, PAGE_SIZE, wq->unbound_attrs->cpumask);
+       written = scnprintf(buf, PAGE_SIZE, "%*pb\n",
+                           cpumask_pr_args(wq->unbound_attrs->cpumask));
        mutex_unlock(&wq->mutex);
-
-       written += scnprintf(buf + written, PAGE_SIZE - written, "\n");
        return written;
 }