I get these problems trying to build dat with 2.6.11.11 (svn rev 2595): *** Warning: "dat_registry_add_provider" [drivers/infiniband/ulp/dat-provider/ib_dat_provider.ko] undefined! *** Warning: "dat_registry_remove_provider" [drivers/infiniband/ulp/dat-provider/ib_dat_provider.ko] undefined! -JE