slub: 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.

* This is an equivalent conversion but the whole function should be
  converted to use scnprinf famiily of functions rather than
  performing custom output length predictions in multiple places.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NChristoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/slub.c

@@ -4108,20 +4108,16 @@ static int list_locations(struct kmem_cache *s, char *buf,
 
 		if (num_online_cpus() > 1 &&
 				!cpumask_empty(to_cpumask(l->cpus)) &&
-				len < PAGE_SIZE - 60) {
-			len += sprintf(buf + len, " cpus=");
-			len += cpulist_scnprintf(buf + len,
-						 PAGE_SIZE - len - 50,
-						 to_cpumask(l->cpus));
-		}
+				len < PAGE_SIZE - 60)
+			len += scnprintf(buf + len, PAGE_SIZE - len - 50,
+					 " cpus=%*pbl",
+					 cpumask_pr_args(to_cpumask(l->cpus)));
 
 		if (nr_online_nodes > 1 && !nodes_empty(l->nodes) &&
-				len < PAGE_SIZE - 60) {
-			len += sprintf(buf + len, " nodes=");
-			len += nodelist_scnprintf(buf + len,
-						  PAGE_SIZE - len - 50,
-						  l->nodes);
-		}
+				len < PAGE_SIZE - 60)
+			len += scnprintf(buf + len, PAGE_SIZE - len - 50,
+					 " nodes=%*pbl",
+					 nodemask_pr_args(&l->nodes));
 
 		len += sprintf(buf + len, "\n");
 	}