diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index d0f649a..3c1dacd 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -225,12 +225,12 @@
 		ret = trace_seq_printf(s,
 			"MAP %lu.%06lu %d 0x%lx 0x%lx 0x%lx 0x%lx %d\n",
 			secs, usec_rem, m->map_id, m->phys, m->virt, m->len,
-			0UL, entry->pid);
+			0UL, 0);
 		break;
 	case MMIO_UNPROBE:
 		ret = trace_seq_printf(s,
 			"UNMAP %lu.%06lu %d 0x%lx %d\n",
-			secs, usec_rem, m->map_id, 0UL, entry->pid);
+			secs, usec_rem, m->map_id, 0UL, 0);
 		break;
 	default:
 		ret = trace_seq_printf(s, "map what?\n");