One part of automated timer conversion tools did not take into account
void * variables when searching out prior direct timer callback usage,
which resulted in an attempt to dereference the timer field without a
proper type.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>