Blackfin arch: fix bug - kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch

Free spinlock before call IPI handlers.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>


Header from folded patch 'blackfin_arch__fix_bug_-_kgdb_fails_to_continue_after_setting_breakpoint_on_bf561-ezkit_kernel_with_smp_patch-1':

Blackfin arch: fix bug - kgdb fails to continue after setting breakpoint on bf561-ezkit kernel with smp patch

Don't test l1 code in SMP kernel.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/mach-common/smp.c

@@ -158,10 +158,14 @@ static irqreturn_t ipi_handler(int irq, void *dev_instance)
 			kfree(msg);
 			break;
 		case BFIN_IPI_CALL_FUNC:
+			spin_unlock(&msg_queue->lock);
 			ipi_call_function(cpu, msg);
+			spin_lock(&msg_queue->lock);
 			break;
 		case BFIN_IPI_CPU_STOP:
+			spin_unlock(&msg_queue->lock);
 			ipi_cpu_stop(cpu);
+			spin_lock(&msg_queue->lock);
 			kfree(msg);
 			break;
 		default:
@@ -457,7 +461,7 @@ void smp_icache_flush_range_others(unsigned long start, unsigned long end)
 	smp_flush_data.start = start;
 	smp_flush_data.end = end;
 
-	if (smp_call_function(&ipi_flush_icache, &smp_flush_data, 1))
+	if (smp_call_function(&ipi_flush_icache, &smp_flush_data, 0))
 		printk(KERN_WARNING "SMP: failed to run I-cache flush request on other CPUs\n");
 }
 EXPORT_SYMBOL_GPL(smp_icache_flush_range_others);