/* * Define default pcounter functions * Note that often used pcounters use dedicated functions to get a speed increase. * (see DEFINE_PCOUNTER/REF_PCOUNTER_MEMBER) */ #include <linux/module.h>#include <linux/pcounter.h>#include <linux/smp.h>#include <linux/cpumask.h> static void pcounter_dyn_add(struct pcounter *self, int inc){	per_cpu_ptr(self->per_cpu_values, smp_processor_id())[0] += inc;} static int pcounter_dyn_getval(const struct pcounter *self, int cpu){	return per_cpu_ptr(self->per_cpu_values, cpu)[0];} int pcounter_getval(const struct pcounter *self){	int res = 0, cpu; 	for_each_possible_cpu(cpu)		res += self->getval(self, cpu); 	return res;}EXPORT_SYMBOL_GPL(pcounter_getval); int pcounter_alloc(struct pcounter *self){	int rc = 0;	if (self->add == NULL) {		self->per_cpu_values = alloc_percpu(int);		if (self->per_cpu_values != NULL) {			self->add    = pcounter_dyn_add;			self->getval = pcounter_dyn_getval;		} else			rc = 1;	}	return rc;}EXPORT_SYMBOL_GPL(pcounter_alloc); void pcounter_free(struct pcounter *self){	if (self->per_cpu_values != NULL) {		free_percpu(self->per_cpu_values);		self->per_cpu_values = NULL;		self->getval = NULL;		self->add = NULL;	}}EXPORT_SYMBOL_GPL(pcounter_free);