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arm: 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.

* Line termination only requires one extra space at the end of the
  buffer.  Use PAGE_SIZE - 1 instead of PAGE_SIZE - 2 when formatting.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Russell King <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Tejun Heo 2015-02-13 14:37:20 -08:00 • committed by Linus Torvalds
commit 660e5ec02d
1 changed files with 2 additions and 2 deletions
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4
drivers/bus/arm-cci.c
View file

@ -806,8 +806,8 @@ static int cci_pmu_event_init(struct perf_event *event)
static ssize_t pmu_attr_cpumask_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int n = cpulist_scnprintf(buf, PAGE_SIZE - 2, &pmu->cpus);
int n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
cpumask_pr_args(&pmu->cpus));
buf[n++] = '\n';
buf[n] = '\0';
return n;