bug[220] kgdb: change the smp cross core function entry

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>

arch/blackfin/kernel/kgdb.c

@@ -330,9 +330,6 @@ static void bfin_disable_hw_debug(struct pt_regs *regs)
 }
 
 #ifdef CONFIG_SMP
-extern void generic_exec_single(int cpu, struct call_single_data *data, int wait);
-static struct call_single_data kgdb_smp_ipi_data[NR_CPUS];
-
 void kgdb_passive_cpu_callback(void *info)
 {
 	kgdb_nmicallback(raw_smp_processor_id(), get_irq_regs());
@@ -343,15 +340,14 @@ void kgdb_roundup_cpus(unsigned long flags)
 	unsigned int cpu;
 
 	for (cpu = cpumask_first(cpu_online_mask); cpu < nr_cpu_ids;
-		cpu = cpumask_next(cpu, cpu_online_mask)) {
-		kgdb_smp_ipi_data[cpu].func = kgdb_passive_cpu_callback;
-		generic_exec_single(cpu, &kgdb_smp_ipi_data[cpu], 0);
-	}
+		cpu = cpumask_next(cpu, cpu_online_mask))
+		smp_call_function_single(cpu, kgdb_passive_cpu_callback,
+					 NULL, 0);
 }
 
 void kgdb_roundup_cpu(int cpu, unsigned long flags)
 {
-	generic_exec_single(cpu, &kgdb_smp_ipi_data[cpu], 0);
+	smp_call_function_single(cpu, kgdb_passive_cpu_callback, NULL, 0);
 }
 #endif