padata: 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: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/padata.c b/kernel/padata.c
index 161402f..b38bea9 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -917,15 +917,10 @@
else
cpumask = pinst->cpumask.pcpu;
- len = bitmap_scnprintf(buf, PAGE_SIZE, cpumask_bits(cpumask),
- nr_cpu_ids);
- if (PAGE_SIZE - len < 2)
- len = -EINVAL;
- else
- len += sprintf(buf + len, "\n");
-
+ len = snprintf(buf, PAGE_SIZE, "%*pb\n",
+ nr_cpu_ids, cpumask_bits(cpumask));
mutex_unlock(&pinst->lock);
- return len;
+ return len < PAGE_SIZE ? len : -EINVAL;
}
static ssize_t store_cpumask(struct padata_instance *pinst,