1 files changed, 7 insertions, 4 deletions

diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 0e94b3d091f7..1f07895977a0 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -28,13 +28,13 @@ void start_boot_trace(void)
 
 void enable_boot_trace(void)
 {
-        if (pre_initcalls_finished)
+        if (boot_trace && pre_initcalls_finished)
                 tracing_start_sched_switch_record();
 }
 
 void disable_boot_trace(void)
 {
-        if (pre_initcalls_finished)
+        if (boot_trace && pre_initcalls_finished)
                 tracing_stop_sched_switch_record();
 }
 
@@ -43,6 +43,9 @@ static int boot_trace_init(struct trace_array *tr)
         int cpu;
         boot_trace = tr;
 
+        if (!tr)
+                return 0;
+
         for_each_cpu(cpu, cpu_possible_mask)
                 tracing_reset(tr, cpu);
 
@@ -132,7 +135,7 @@ void trace_boot_call(struct boot_trace_call *bt, initcall_t fn)
         unsigned long irq_flags;
         struct trace_array *tr = boot_trace;
 
-        if (!pre_initcalls_finished)
+        if (!tr || !pre_initcalls_finished)
                 return;
 
         /* Get its name now since this function could
@@ -164,7 +167,7 @@ void trace_boot_ret(struct boot_trace_ret *bt, initcall_t fn)
         unsigned long irq_flags;
         struct trace_array *tr = boot_trace;
 
-        if (!pre_initcalls_finished)
+        if (!tr || !pre_initcalls_finished)
                 return;
 
         sprint_symbol(bt->func, (unsigned long)fn);