https://bugzilla.kernel.org/show_bug.cgi?id=39162
--- Comment #1 from Steven Rostedt rostedt@goodmis.org 2011-08-09 11:50:18 --- We just missed the main release for this fix. Please apply:
commit f7bc8b61f65726ff98f52e286b28e294499d7a08 ftrace: Fix regression where ftrace breaks when modules are loaded
It's already in mainline.
-- Steve