include/linux/cpumask.h

   1 #ifndef __LINUX_CPUMASK_H
   2 #define __LINUX_CPUMASK_H
   3
   4 #include <linux/threads.h>
   5 #include <linux/bitmap.h>
   6 #include <asm/cpumask.h>
   7 #include <asm/bug.h>
   8
   9 #ifdef CONFIG_SMP
  10
  11 extern cpumask_t cpu_online_map;
  12 extern cpumask_t cpu_possible_map;
  13 extern cpumask_t cpu_present_map;
  14
  15 #define num_online_cpus()               cpus_weight(cpu_online_map)
  16 #define num_possible_cpus()             cpus_weight(cpu_possible_map)
  17 #define num_present_cpus()              cpus_weight(cpu_present_map)
  18
  19 #define cpu_online(cpu)                 cpu_isset(cpu, cpu_online_map)
  20 #define cpu_possible(cpu)               cpu_isset(cpu, cpu_possible_map)
  21 #define cpu_present(cpu)                cpu_isset(cpu, cpu_present_map)
  22
  23 #define for_each_cpu_mask(cpu, mask)                                    \
  24         for (cpu = first_cpu_const(mk_cpumask_const(mask));             \
  25                 cpu < NR_CPUS;                                          \
  26                 cpu = next_cpu_const(cpu, mk_cpumask_const(mask)))
  27
  28 #define for_each_cpu(cpu) for_each_cpu_mask(cpu, cpu_possible_map)
  29 #define for_each_online_cpu(cpu) for_each_cpu_mask(cpu, cpu_online_map)
  30 #define for_each_present_cpu(cpu) for_each_cpu_mask(cpu, cpu_present_map)
  31 #else
  32 #define cpu_online_map                  cpumask_of_cpu(0)
  33 #define cpu_possible_map                cpumask_of_cpu(0)
  34 #define cpu_present_map                 cpumask_of_cpu(0)
  35
  36 #define num_online_cpus()               1
  37 #define num_possible_cpus()             1
  38 #define num_present_cpus()              1
  39
  40 #define cpu_online(cpu)                 ({ BUG_ON((cpu) != 0); 1; })
  41 #define cpu_possible(cpu)               ({ BUG_ON((cpu) != 0); 1; })
  42 #define cpu_present(cpu)                ({ BUG_ON((cpu) != 0); 1; })
  43
  44 #define for_each_cpu_mask(cpu, mask) for (cpu = 0; cpu < 1; cpu++)
  45 #define for_each_cpu(cpu) for (cpu = 0; cpu < 1; cpu++)
  46 #define for_each_online_cpu(cpu) for (cpu = 0; cpu < 1; cpu++)
  47 #define for_each_present_cpu(cpu) for (cpu = 0; cpu < 1; cpu++)
  48 #endif
  49
  50 #define cpumask_scnprintf(buf, buflen, map)                             \
  51         bitmap_scnprintf(buf, buflen, cpus_addr(map), NR_CPUS)
  52
  53 #define cpumask_parse(buf, buflen, map)                                 \
  54         bitmap_parse(buf, buflen, cpus_addr(map), NR_CPUS)
  55
  56 #endif /* __LINUX_CPUMASK_H */