ftrace: Add missing comment for FTRACE_OPS_FL_RCU
All the enum flags for FTRACE_OPS has a comment except for the RCU one. Add
the comment for that.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 473f088..1b6992e 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -119,6 +119,7 @@ ftrace_func_t ftrace_ops_get_func(struct ftrace_ops *ops);
* for any of the functions that this ops will be registered for, then
* this ops will fail to register or set_filter_ip.
* PID - Is affected by set_ftrace_pid (allows filtering on those pids)
+ * RCU - Set when the ops can only be called when RCU is watching.
*/
enum {
FTRACE_OPS_FL_ENABLED = 1 << 0,