ClabureDB: Classified Bug-Reports Database

/**
 * smp_call_function(): Run a function on all other CPUs.
 * @func: The function to run. This must be fast and non-blocking.
 * @info: An arbitrary pointer to pass to the function.
 * @wait: If true, wait (atomically) until function has completed on other CPUs.
 *
 * Returns 0 on success, else a negative status code.
 *
 * If @wait is true, then returns once @func has returned; otherwise
 * it returns just before the target cpu calls @func. In case of allocation
 * failure, @wait will be implicitly turned on.
 *
 * You must not call this function with disabled interrupts or from a
 * hardware interrupt handler or from a bottom half handler.
 */
int smp_call_function(void (*func)(void *), void *info, int wait)
{
        int ret;

        preempt_disable();
        ret = smp_call_function_mask(cpu_online_map, func, info, wait);
        preempt_enable();
        return ret;
}
EXPORT_SYMBOL(smp_call_function);

void ipi_call_lock(void)
{
        spin_lock(&call_function_lock);
}

void ipi_call_unlock(void)
{
        spin_unlock(&call_function_lock);
}

void ipi_call_lock_irq(void)
{
        spin_lock_irq(&call_function_lock);
}