[PATCH 09/35] cpumask: add cpumask_copy()

[Mike Travis]

Since cpumasks are to become pointers to undefined structs, we need to
replace assignments.  Also, dynamically allocated ones will eventually
be nr_cpu_ids bits (<= NR_CPUS), so assignment is a definite no-no.

From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Mike Travis <travis@xxxxxxx>
---
 include/linux/cpumask.h |    8 ++++++++
 1 file changed, 8 insertions(+)

--- linux-2.6.28.orig/include/linux/cpumask.h
+++ linux-2.6.28/include/linux/cpumask.h
@@ -64,6 +64,8 @@
  * int next_cpu(cpu, mask)		Next cpu past 'cpu', or NR_CPUS
  * int next_cpu_nr(cpu, mask)		Next cpu past 'cpu', or nr_cpu_ids
  *
+ * void cpumask_copy(dmask, smask)	dmask = smask
+ *
  * size_t cpumask_size()		Length of cpumask in bytes.
  * cpumask_t cpumask_of_cpu(cpu)	Return cpumask with bit 'cpu' set
  *					(can be used as an lvalue)
@@ -351,6 +353,12 @@ static inline void cpumask_fold(struct c
 	bitmap_fold(dstp->bits, origp->bits, sz, NR_CPUS);
 }
 
+static inline void cpumask_copy(struct cpumask *dstp,
+				const struct cpumask *srcp)
+{
+	bitmap_copy(cpumask_bits(dstp), cpumask_bits(srcp), NR_CPUS);
+}
+
 /*
  * Special-case data structure for "single bit set only" constant CPU masks.
  *

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