A conceptual design of the 2.5 GeV proton linac of the European Spallation Source, ESS, was presented in a Conceptual Design Report in early 2012. Work is now progressing towards a Technical Design Report at the end of 2012. Changes to the linac configuration during the last year include a somewhat longer DTL and a change to fully segmented cryomodules. This paper reviews the current design status of the accelerator and its subsystems.