linux-imx

/*

 * Uniprocessor-only support functions.  The counterpart to kernel/smp.c

 */

​

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/export.h>

#include <linux/smp.h>

#include <linux/hypervisor.h>

​

int smp_call_function_single(int cpu, void (*func) (void *info), void *info,

                int wait)

{

    unsigned long flags;

​

    WARN_ON(cpu != 0);

​

    local_irq_save(flags);

    func(info);

    local_irq_restore(flags);

​

    return 0;

}

EXPORT_SYMBOL(smp_call_function_single);

​

int smp_call_function_single_async(int cpu, call_single_data_t *csd)

{

    unsigned long flags;

​

    local_irq_save(flags);

    csd->func(csd->info);

    local_irq_restore(flags);

    return 0;

}

EXPORT_SYMBOL(smp_call_function_single_async);

​

int on_each_cpu(smp_call_func_t func, void *info, int wait)

{

    unsigned long flags;

​

    local_irq_save(flags);

    func(info);

    local_irq_restore(flags);

    return 0;

}

EXPORT_SYMBOL(on_each_cpu);

​

/*

 * Note we still need to test the mask even for UP

 * because we actually can get an empty mask from

 * code that on SMP might call us without the local

 * CPU in the mask.

 */

void on_each_cpu_mask(const struct cpumask *mask,

              smp_call_func_t func, void *info, bool wait)

{

    unsigned long flags;

​

    if (cpumask_test_cpu(0, mask)) {

        local_irq_save(flags);

        func(info);

        local_irq_restore(flags);

    }