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1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/nodemask.h>
3 #include <linux/module.h>
4 #include <linux/random.h>
5
6 int __next_node_in(int node, const nodemask_t *srcp)
7 {
8 int ret = __next_node(node, srcp);
9
10 if (ret == MAX_NUMNODES)
11 ret = __first_node(srcp);
12 return ret;
13 }
14 EXPORT_SYMBOL(__next_node_in);
15
16 #ifdef CONFIG_NUMA
17 /*
18 * Return the bit number of a random bit set in the nodemask.
19 * (returns NUMA_NO_NODE if nodemask is empty)
20 */
21 int node_random(const nodemask_t *maskp)
22 {
23 int w, bit = NUMA_NO_NODE;
24
25 w = nodes_weight(*maskp);
26 if (w)
27 bit = bitmap_ord_to_pos(maskp->bits,
28 get_random_int() % w, MAX_NUMNODES);
29 return bit;
30 }
31 #endif