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drivers/base: 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 <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 14:37:56 -08:00
committed by Linus Torvalds
parent 125918dbd8
commit f799b1a7fb
2 changed files with 3 additions and 2 deletions
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drivers/base/node.c
+2 -1
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@@ -605,7 +605,8 @@ static ssize_t print_nodes_state(enum node_states state, char *buf)
{
int n;
n = nodelist_scnprintf(buf, PAGE_SIZE-2, node_states[state]);
n = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
nodemask_pr_args(&node_states[state]));
buf[n++] = '\n';
buf[n] = '\0';
return n;