diff options
Diffstat (limited to 'lib/nodemask.c')
-rw-r--r-- | lib/nodemask.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/lib/nodemask.c b/lib/nodemask.c new file mode 100644 index 0000000..e42a5bf4 --- /dev/null +++ b/lib/nodemask.c @@ -0,0 +1,30 @@ +#include <linux/nodemask.h> +#include <linux/module.h> +#include <linux/random.h> + +int __next_node_in(int node, const nodemask_t *srcp) +{ + int ret = __next_node(node, srcp); + + if (ret == MAX_NUMNODES) + ret = __first_node(srcp); + return ret; +} +EXPORT_SYMBOL(__next_node_in); + +#ifdef CONFIG_NUMA +/* + * Return the bit number of a random bit set in the nodemask. + * (returns NUMA_NO_NODE if nodemask is empty) + */ +int node_random(const nodemask_t *maskp) +{ + int w, bit = NUMA_NO_NODE; + + w = nodes_weight(*maskp); + if (w) + bit = bitmap_ord_to_pos(maskp->bits, + get_random_int() % w, MAX_NUMNODES); + return bit; +} +#endif |