lib/pcounter.c

   1 /*
   2  * Define default pcounter functions
   3  * Note that often used pcounters use dedicated functions to get a speed increase.
   4  * (see DEFINE_PCOUNTER/REF_PCOUNTER_MEMBER)
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/pcounter.h>
   9 #include <linux/smp.h>
  10
  11 void pcounter_def_add(struct pcounter *self, int inc)
  12 {
  13         per_cpu_ptr(self->per_cpu_values, smp_processor_id())[0] += inc;
  14 }
  15
  16 EXPORT_SYMBOL_GPL(pcounter_def_add);
  17
  18 int pcounter_def_getval(const struct pcounter *self)
  19 {
  20         int res = 0, cpu;
  21         for_each_possible_cpu(cpu)
  22                 res += per_cpu_ptr(self->per_cpu_values, cpu)[0];
  23         return res;
  24 }
  25
  26 EXPORT_SYMBOL_GPL(pcounter_def_getval);