[mirror_ubuntu-artful-kernel.git] / lib / nodemask.c

#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
0edaf86c AM	1	#include <linux/nodemask.h>
	2	#include <linux/module.h>
	3	#include <linux/random.h>
	4
	5	int __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	}
	13	EXPORT_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	*/
	20	int 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