ftrace: Fix function pid filter on instances

[mirror_ubuntu-zesty-kernel.git] / kernel / trace / ftrace.c

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 98775772f7d63cdea32488decb94d5e3bc2a3fae..c24bf79bdf9fe2b8656f872265bb4503026a5f29 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -5422,6 +5422,15 @@ static void clear_ftrace_pids(struct trace_array *tr)
        trace_free_pid_list(pid_list);
 }
 
+void ftrace_clear_pids(struct trace_array *tr)
+{
+       mutex_lock(&ftrace_lock);
+
+       clear_ftrace_pids(tr);
+
+       mutex_unlock(&ftrace_lock);
+}
+
 static void ftrace_pid_reset(struct trace_array *tr)
 {
        mutex_lock(&ftrace_lock);