linux/lib/cpumask.c
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   1#include <linux/kernel.h>
   2#include <linux/bitops.h>
   3#include <linux/cpumask.h>
   4#include <linux/module.h>
   5
   6int __first_cpu(const cpumask_t *srcp)
   7{
   8        return min_t(int, NR_CPUS, find_first_bit(srcp->bits, NR_CPUS));
   9}
  10EXPORT_SYMBOL(__first_cpu);
  11
  12int __next_cpu(int n, const cpumask_t *srcp)
  13{
  14        return min_t(int, NR_CPUS, find_next_bit(srcp->bits, NR_CPUS, n+1));
  15}
  16EXPORT_SYMBOL(__next_cpu);
  17
  18#if NR_CPUS > 64
  19int __next_cpu_nr(int n, const cpumask_t *srcp)
  20{
  21        return min_t(int, nr_cpu_ids,
  22                                find_next_bit(srcp->bits, nr_cpu_ids, n+1));
  23}
  24EXPORT_SYMBOL(__next_cpu_nr);
  25#endif
  26
  27int __any_online_cpu(const cpumask_t *mask)
  28{
  29        int cpu;
  30
  31        for_each_cpu_mask(cpu, *mask) {
  32                if (cpu_online(cpu))
  33                        break;
  34        }
  35        return cpu;
  36}
  37EXPORT_SYMBOL(__any_online_cpu);
  38
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