arm: 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.

* 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 <tj@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 0ce5e2d..84fd660 100644 (file)
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -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;