+/**
+ * __smp_call_function_single(): Run a function on a specific CPU
+ * @cpu: The CPU to run on.
+ * @csd: Pre-allocated and setup data structure
+ * @wait: If true, wait until function has completed on specified CPU.
+ *
+ * Like smp_call_function_single(), but allow caller to pass in a
+ * pre-allocated data structure. Useful for embedding @data inside
+ * other structures, for instance.
+ */
+int __smp_call_function_single(int cpu, struct call_single_data *csd, int wait)
+{
+ int err = 0;
+ int this_cpu;
+
+ this_cpu = get_cpu();
+ /*
+ * Can deadlock when called with interrupts disabled.
+ * We allow cpu's that are not yet online though, as no one else can
+ * send smp call function interrupt to this cpu and as such deadlocks
+ * can't happen.
+ */
+ WARN_ON_ONCE(cpu_online(this_cpu) && wait && irqs_disabled()
+ && !oops_in_progress);
+
+ err = generic_exec_single(cpu, csd, csd->func, csd->info, wait);
+ put_cpu();
+
+ return err;
+}
+EXPORT_SYMBOL_GPL(__smp_call_function_single);
+