allow_signal: kill the bogus ->mm check, add a note about CLONE_SIGHAND

[safe/jmp/linux-2.6] / kernel / tracepoint.c

diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 94ac4e3..1ef5d3a 100644 (file)
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -272,12 +272,15 @@ static void disable_tracepoint(struct tracepoint *elem)
  *
  * Updates the probe callback corresponding to a range of tracepoints.
  */
-void tracepoint_update_probe_range(struct tracepoint *begin,
-       struct tracepoint *end)
+void
+tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end)
 {
        struct tracepoint *iter;
        struct tracepoint_entry *mark_entry;
 
+       if (!begin)
+               return;
+
        mutex_lock(&tracepoints_mutex);
        for (iter = begin; iter < end; iter++) {
                mark_entry = get_tracepoint(iter->name);
@@ -542,6 +545,8 @@ void tracepoint_iter_reset(struct tracepoint_iter *iter)
 }
 EXPORT_SYMBOL_GPL(tracepoint_iter_reset);
 
+#ifdef CONFIG_MODULES
+
 int tracepoint_module_notify(struct notifier_block *self,
                             unsigned long val, void *data)
 {
@@ -570,3 +575,5 @@ static int init_tracepoints(void)
        return register_module_notifier(&tracepoint_module_nb);
 }
 __initcall(init_tracepoints);
+
+#endif /* CONFIG_MODULES */