up.c

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/*
 * 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>

int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
                int wait)
{
    WARN_ON(cpu != 0);

    local_irq_disable();
    (func)(info);
    local_irq_enable();

    return 0;
}
EXPORT_SYMBOL(smp_call_function_single);