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padata: use %*pb[l] to print bitmaps including cpumasks and nodemasks
author
Tejun Heo
<tj@kernel.org>
Fri, 13 Feb 2015 22:38:05 +0000
(14:38 -0800)
committer
Linus Torvalds
<torvalds@linux-foundation.org>
Sat, 14 Feb 2015 05:21:38 +0000
(21:21 -0800)
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>
kernel/padata.c
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diff --git
a/kernel/padata.c
b/kernel/padata.c
index 161402f0b517c9f483f166585bd61d61bac2e3f3..b38bea9c466a012a9bc04423af25a5c7d04be34d 100644
(file)
--- a/
kernel/padata.c
+++ b/
kernel/padata.c
@@
-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,