The Linux operating system is undergoing continual evolution. Evolution
in the kernel and generic driver modules often triggers the need for
corresponding evolutions in specific device drivers. Such collateral
evolutions are tedious, because of the large number of device drivers,
and error-prone, because of the complexity of the code modifications
involved. We propose an automatic tool, Coccinelle, to aid in the driver
evolution process. In this talk, we examine some recent evolutions in
Linux and the collateral evolutions they trigger, and assess the
corresponding requirements on Coccinelle.