cpumask, nodemask: implement cpumask/nodemask_pr_args()

printf family of functions can now format bitmaps using '%*pb[l]' and
all cpumask and nodemask formatting will be converted to use it.  To
ease printing these masks with '%*pb[l]' which require two params -
the number of bits and the actual bitmap, this patch implement
cpumask_pr_args() and nodemask_pr_args() which can be used to provide
arguments for '%*pb[l]'

Signed-off-by: Tejun Heo <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: "John W. Linville" <[email protected]>
Cc: "Paul E. McKenney" <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Chris Zankel <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: Fenghua Yu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Mike Travis <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russell King <[email protected]>
Cc: Steffen Klassert <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Tony Luck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index ee9acb0ce542..a9b3d00915a0 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -22,6 +22,14 @@ typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
  */
 #define cpumask_bits(maskp) ((maskp)->bits)
 
+/**
+ * cpumask_pr_args - printf args to output a cpumask
+ * @maskp: cpumask to be printed
+ *
+ * Can be used to provide arguments for '%*pb[l]' when printing a cpumask.
+ */
+#define cpumask_pr_args(maskp)		nr_cpu_ids, cpumask_bits(maskp)
+
 #if NR_CPUS == 1
 #define nr_cpu_ids		1
 #else
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 21cef483dc1b..10f8e556ba07 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -98,6 +98,14 @@
 typedef struct { DECLARE_BITMAP(bits, MAX_NUMNODES); } nodemask_t;
 extern nodemask_t _unused_nodemask_arg_;
 
+/**
+ * nodemask_pr_args - printf args to output a nodemask
+ * @maskp: nodemask to be printed
+ *
+ * Can be used to provide arguments for '%*pb[l]' when printing a nodemask.
+ */
+#define nodemask_pr_args(maskp)		MAX_NUMNODES, (maskp)->bits
+
 /*
  * The inline keyword gives the compiler room to decide to inline, or
  * not inline a function as it sees best.  However, as these functions