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

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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>
This commit is contained in:
Tejun Heo 2015-02-13 14:38:05 -08:00 committed by Linus Torvalds
parent 9e763e0f4f
commit 4497da6f95
1 changed files with 3 additions and 8 deletions
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11
kernel/padata.c
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@ -917,15 +917,10 @@ static ssize_t show_cpumask(struct padata_instance *pinst,
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,