mirror of https://gitee.com/openkylin/linux.git
31 lines
617 B
C
31 lines
617 B
C
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#include <linux/nodemask.h>
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#include <linux/module.h>
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#include <linux/random.h>
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int __next_node_in(int node, const nodemask_t *srcp)
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{
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int ret = __next_node(node, srcp);
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if (ret == MAX_NUMNODES)
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ret = __first_node(srcp);
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return ret;
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}
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EXPORT_SYMBOL(__next_node_in);
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#ifdef CONFIG_NUMA
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/*
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* Return the bit number of a random bit set in the nodemask.
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* (returns NUMA_NO_NODE if nodemask is empty)
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*/
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int node_random(const nodemask_t *maskp)
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{
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int w, bit = NUMA_NO_NODE;
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w = nodes_weight(*maskp);
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if (w)
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bit = bitmap_ord_to_pos(maskp->bits,
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get_random_int() % w, MAX_NUMNODES);
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return bit;
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}
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#endif
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