Merge tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

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

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 356bb70d071e0001d2690c1b191dc8b282dd35d0..1f0f547c54da2fee935a89316e6e2e74df7e6f34 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4262,6 +4262,23 @@ int ftrace_set_filter_ip(struct ftrace_ops *ops, unsigned long ip,
 }
 EXPORT_SYMBOL_GPL(ftrace_set_filter_ip);
 
+/**
+ * ftrace_ops_set_global_filter - setup ops to use global filters
+ * @ops - the ops which will use the global filters
+ *
+ * ftrace users who need global function trace filtering should call this.
+ * It can set the global filter only if ops were not initialized before.
+ */
+void ftrace_ops_set_global_filter(struct ftrace_ops *ops)
+{
+       if (ops->flags & FTRACE_OPS_FL_INITIALIZED)
+               return;
+
+       ftrace_ops_init(ops);
+       ops->func_hash = &global_ops.local_hash;
+}
+EXPORT_SYMBOL_GPL(ftrace_ops_set_global_filter);
+
 static int
 ftrace_set_regex(struct ftrace_ops *ops, unsigned char *buf, int len,
                 int reset, int enable)