ftrace: Remove a superfluous check

register_ftrace_function() checks ftrace_disabled and calls
__register_ftrace_function which does it again.

Drop the first check and add the unlikely hint to the second one. Also,
drop the label as John correctly notices.

No functional change.

Link: http://lkml.kernel.org/r/20120329171140.GE6409@aftab
Cc: Borislav Petkov <[email protected]>
Cc: John Kacur <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a008663d86c8e740c64c1cc26977a7a199917b9b..b4f20fba09fcc77dc571bdf718bfd04adfb29897 100644 (file)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -312,7 +312,7 @@ static int remove_ftrace_list_ops(struct ftrace_ops **list,
 
 static int __register_ftrace_function(struct ftrace_ops *ops)
 {
-       if (ftrace_disabled)
+       if (unlikely(ftrace_disabled))
                return -ENODEV;
 
        if (FTRACE_WARN_ON(ops == &global_ops))
@@ -4299,16 +4299,12 @@ int register_ftrace_function(struct ftrace_ops *ops)
 
        mutex_lock(&ftrace_lock);
 
-       if (unlikely(ftrace_disabled))
-               goto out_unlock;
-
        ret = __register_ftrace_function(ops);
        if (!ret)
                ret = ftrace_startup(ops, 0);
 
-
- out_unlock:
        mutex_unlock(&ftrace_lock);
+
        return ret;
 }
 EXPORT_SYMBOL_GPL(register_ftrace_function);