1#include <linux/nodemask.h>
 2#include <linux/module.h>
 3#include <linux/random.h>
 4
 5int __next_node_in(int node, const nodemask_t *srcp)
 6{
 7	int ret = __next_node(node, srcp);
 8
 9	if (ret == MAX_NUMNODES)
10		ret = __first_node(srcp);
11	return ret;
12}
13EXPORT_SYMBOL(__next_node_in);
14
15#ifdef CONFIG_NUMA
16/*
17 * Return the bit number of a random bit set in the nodemask.
18 * (returns NUMA_NO_NODE if nodemask is empty)
19 */
20int node_random(const nodemask_t *maskp)
21{
22	int w, bit = NUMA_NO_NODE;
23
24	w = nodes_weight(*maskp);
25	if (w)
26		bit = bitmap_ord_to_pos(maskp->bits,
27			get_random_int() % w, MAX_NUMNODES);
28	return bit;
29}
30#endif