[thirdparty/linux.git] / lib / nodemask.c

// SPDX-License-Identifier: GPL-2.0
#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
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
0edaf86c AM	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