ftrace: Statically initialize pm notifier block

Instead of initializing the pm notifier block in register_ftrace_graph(),
initialize it statically. This safes us some code.

Found in the PaX patch, written by the PaX Team.

Link: http://lkml.kernel.org/p/1396186310-3156-1-git-send-email-minipli@googlemail.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: PaX Team <pageexec@freemail.hu>
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 8f61ef7..846888e 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -4860,7 +4860,6 @@ ftrace_enable_sysctl(struct ctl_table *table, int write,
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 
 static int ftrace_graph_active;
-static struct notifier_block ftrace_suspend_notifier;
 
 int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace)
 {
@@ -5036,6 +5035,10 @@ static void update_function_graph_func(void)
                ftrace_graph_entry = ftrace_graph_entry_test;
 }
 
+static struct notifier_block ftrace_suspend_notifier = {
+       .notifier_call = ftrace_suspend_notifier_call,
+};
+
 int register_ftrace_graph(trace_func_graph_ret_t retfunc,
                        trace_func_graph_ent_t entryfunc)
 {
@@ -5049,7 +5052,6 @@ int register_ftrace_graph(trace_func_graph_ret_t retfunc,
                goto out;
        }
 
-       ftrace_suspend_notifier.notifier_call = ftrace_suspend_notifier_call;
        register_pm_notifier(&ftrace_suspend_notifier);
 
        ftrace_graph_active++;