0f532f3861
cpumask: add highest_possible_node_id(), analogous to highest_possible_processor_id(). [pj@sgi.com: fix typo] Signed-off-by: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
61 lines
1.2 KiB
C
61 lines
1.2 KiB
C
#include <linux/kernel.h>
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#include <linux/bitops.h>
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#include <linux/cpumask.h>
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#include <linux/module.h>
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int __first_cpu(const cpumask_t *srcp)
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{
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return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS));
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}
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EXPORT_SYMBOL(__first_cpu);
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int __next_cpu(int n, const cpumask_t *srcp)
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{
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return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1));
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}
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EXPORT_SYMBOL(__next_cpu);
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/*
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* Find the highest possible smp_processor_id()
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*
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* Note: if we're prepared to assume that cpu_possible_map never changes
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* (reasonable) then this function should cache its return value.
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*/
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int highest_possible_processor_id(void)
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{
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unsigned int cpu;
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unsigned highest = 0;
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for_each_cpu_mask(cpu, cpu_possible_map)
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highest = cpu;
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return highest;
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}
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EXPORT_SYMBOL(highest_possible_processor_id);
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int __any_online_cpu(const cpumask_t *mask)
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{
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int cpu;
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for_each_cpu_mask(cpu, *mask) {
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if (cpu_online(cpu))
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break;
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}
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return cpu;
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}
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EXPORT_SYMBOL(__any_online_cpu);
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#if MAX_NUMNODES > 1
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/*
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* Find the highest possible node id.
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*/
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int highest_possible_node_id(void)
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{
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unsigned int node;
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unsigned int highest = 0;
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for_each_node_mask(node, node_possible_map)
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highest = node;
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return highest;
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}
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EXPORT_SYMBOL(highest_possible_node_id);
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#endif
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