This reverts commit 2652d199dd which is
commit 265f3ed077036f053981f5eea0b5b43e7c5b39ff upstream.
It turns the work_on_cpu() function into an #define, which messes with
the systems that were previously depending on that abi symbol. As this
is a change only for when lockdep is enabled, which is NOT in any
running Android system, it is safe to revert for now.
Bug: 161946584
Change-Id: I5f117cccfb411efb742a4faf1cefcb4826faae15
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>