1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/nodemask.h> 3 #include <linux/module.h> 4 #include <linux/random.h> 5 __next_node_in(int node,const nodemask_t * srcp)6int __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 */ node_random(const nodemask_t * maskp)21int 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 32