ftrace: Fix updating of filters for shared global_ops filters

[linux-2.6-microblaze.git] / kernel / trace / ftrace.c

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 929a733..2b35d0b 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4008,8 +4008,32 @@ ftrace_match_addr(struct ftrace_hash *hash, unsigned long ip, int remove)
 static void ftrace_ops_update_code(struct ftrace_ops *ops,
                                   struct ftrace_hash *old_hash)
 {
-       if (ops->flags & FTRACE_OPS_FL_ENABLED && ftrace_enabled)
+       struct ftrace_ops *op;
+
+       if (!ftrace_enabled)
+               return;
+
+       if (ops->flags & FTRACE_OPS_FL_ENABLED) {
                ftrace_run_modify_code(ops, FTRACE_UPDATE_CALLS, old_hash);
+               return;
+       }
+
+       /*
+        * If this is the shared global_ops filter, then we need to
+        * check if there is another ops that shares it, is enabled.
+        * If so, we still need to run the modify code.
+        */
+       if (ops->func_hash != &global_ops.local_hash)
+               return;
+
+       do_for_each_ftrace_op(op, ftrace_ops_list) {
+               if (op->func_hash == &global_ops.local_hash &&
+                   op->flags & FTRACE_OPS_FL_ENABLED) {
+                       ftrace_run_modify_code(op, FTRACE_UPDATE_CALLS, old_hash);
+                       /* Only need to do this once */
+                       return;
+               }
+       } while_for_each_ftrace_op(op);
 }
 
 static int