Hi Ralf, Kconfig symbol MIPS_MT_SMTC was removed in next-20140526, in commit 633648c5ad3 ("MIPS: MT: Remove SMTC support"). A few references to its macro popped up again in next-20140529. These references can be traced back to commits ae4ce45419f9 ("MIPS: traps: Add CPU PM callback for trap configuration") and 74e91335190c ("MIPS: PM: Implement PM helper macros"). And those commits were merged in commit 7b2e5b89e488 ("Merge branch 'wip-mips-pm' of https://github.com/paulburton/linux into mips-for-linux-next"). Now I'm guessing that those references to CONFIG_MIPS_MT_SMTC didn't generate merge conflicts and therefor went unnoticed. The trivial solution here is to remove all code hidden behind those references. Would that solution be correct? Paul Bolle