ksoftirqd: Enable IRQs and call cond_resched() before poking RCU

[firefly-linux-kernel-4.4.55.git] / kernel / trace / ftrace.c

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 4b93b841225248e692e0dd9ed7c9796a1f7cb1e0..401d9bd1fe42cbf484d933183436d61b4ed00723 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -331,12 +331,12 @@ static void update_ftrace_function(void)
                func = ftrace_ops_list_func;
        }
 
+       update_function_graph_func();
+
        /* If there's no change, then do nothing more here */
        if (ftrace_trace_function == func)
                return;
 
-       update_function_graph_func();
-
        /*
         * If we are using the list function, it doesn't care
         * about the function_trace_ops.
@@ -4222,16 +4222,11 @@ static void ftrace_init_module(struct module *mod,
        ftrace_process_locs(mod, start, end);
 }
 
-static int ftrace_module_notify_enter(struct notifier_block *self,
-                                     unsigned long val, void *data)
+void ftrace_module_init(struct module *mod)
 {
-       struct module *mod = data;
-
-       if (val == MODULE_STATE_COMING)
-               ftrace_init_module(mod, mod->ftrace_callsites,
-                                  mod->ftrace_callsites +
-                                  mod->num_ftrace_callsites);
-       return 0;
+       ftrace_init_module(mod, mod->ftrace_callsites,
+                          mod->ftrace_callsites +
+                          mod->num_ftrace_callsites);
 }
 
 static int ftrace_module_notify_exit(struct notifier_block *self,
@@ -4245,11 +4240,6 @@ static int ftrace_module_notify_exit(struct notifier_block *self,
        return 0;
 }
 #else
-static int ftrace_module_notify_enter(struct notifier_block *self,
-                                     unsigned long val, void *data)
-{
-       return 0;
-}
 static int ftrace_module_notify_exit(struct notifier_block *self,
                                     unsigned long val, void *data)
 {
@@ -4257,11 +4247,6 @@ static int ftrace_module_notify_exit(struct notifier_block *self,
 }
 #endif /* CONFIG_MODULES */
 
-struct notifier_block ftrace_module_enter_nb = {
-       .notifier_call = ftrace_module_notify_enter,
-       .priority = INT_MAX,    /* Run before anything that can use kprobes */
-};
-
 struct notifier_block ftrace_module_exit_nb = {
        .notifier_call = ftrace_module_notify_exit,
        .priority = INT_MIN,    /* Run after anything that can remove kprobes */
@@ -4298,10 +4283,6 @@ void __init ftrace_init(void)
                                  __start_mcount_loc,
                                  __stop_mcount_loc);
 
-       ret = register_module_notifier(&ftrace_module_enter_nb);
-       if (ret)
-               pr_warning("Failed to register trace ftrace module enter notifier\n");
-
        ret = register_module_notifier(&ftrace_module_exit_nb);
        if (ret)
                pr_warning("Failed to register trace ftrace module exit notifier\n");