diff options
Diffstat (limited to 'arch/ia64/mm/numa.c')
| -rw-r--r-- | arch/ia64/mm/numa.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c index 3efea7d0a35..2437718bd6b 100644 --- a/arch/ia64/mm/numa.c +++ b/arch/ia64/mm/numa.c @@ -17,6 +17,7 @@ #include <linux/init.h> #include <linux/bootmem.h> #include <linux/module.h> +#include <linux/random.h> #include <asm/mmzone.h> #include <asm/numa.h> @@ -50,6 +51,22 @@ paddr_to_nid(unsigned long paddr) return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0); } +/* + * Return the bit number of a random bit set in the nodemask. + * (returns -1 if nodemask is empty) + */ +int __node_random(const nodemask_t *maskp) +{ + int w, bit = -1; + + w = nodes_weight(*maskp); + if (w) + bit = bitmap_ord_to_pos(maskp->bits, + get_random_int() % w, MAX_NUMNODES); + return bit; +} +EXPORT_SYMBOL(__node_random); + #if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA) /* * Because of holes evaluate on section limits. |