MN10300: Call update_process_times() outside of the xtime_lock
[linux-2.6/mini2440.git] / lib / pcounter.c
blob9b56807da93b483bc91f6e0bfdcedc9854485ec6
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 */
7 #include <linux/module.h>
8 #include <linux/pcounter.h>
9 #include <linux/smp.h>
10 #include <linux/cpumask.h>
12 static void pcounter_dyn_add(struct pcounter *self, int inc)
14 per_cpu_ptr(self->per_cpu_values, smp_processor_id())[0] += inc;
17 static int pcounter_dyn_getval(const struct pcounter *self, int cpu)
19 return per_cpu_ptr(self->per_cpu_values, cpu)[0];
22 int pcounter_getval(const struct pcounter *self)
24 int res = 0, cpu;
26 for_each_possible_cpu(cpu)
27 res += self->getval(self, cpu);
29 return res;
31 EXPORT_SYMBOL_GPL(pcounter_getval);
33 int pcounter_alloc(struct pcounter *self)
35 int rc = 0;
36 if (self->add == NULL) {
37 self->per_cpu_values = alloc_percpu(int);
38 if (self->per_cpu_values != NULL) {
39 self->add = pcounter_dyn_add;
40 self->getval = pcounter_dyn_getval;
41 } else
42 rc = 1;
44 return rc;
46 EXPORT_SYMBOL_GPL(pcounter_alloc);
48 void pcounter_free(struct pcounter *self)
50 if (self->per_cpu_values != NULL) {
51 free_percpu(self->per_cpu_values);
52 self->per_cpu_values = NULL;
53 self->getval = NULL;
54 self->add = NULL;
57 EXPORT_SYMBOL_GPL(pcounter_free);