For example, the following file: drivers/pcmcia/vrc4173_cardu.c contains the following code: INIT_WORK(&socket->tq_work, cardu_bh, socket);. The last time INIT_WORK took three arguments was Linux 2.6.19, so I think no one has been compiling this code recently.

http://thread.gmane.org/gmane.linux.kernel/2104327