checking further for the Makefile in the latest git repo, git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband.git for-linus , there's also no Makefile in the respective directory, ./for-linus/drivers/infiniband/hw/amso1100/ emailed the repo maintainer to ask, "is this an omission? if not, where can i get the Makefile?" and received, Reply "There is a Kbuild file instead of a Makefile there." i'm not yet sure what to do with that ... but, i presume that the 'make' process should *not* look for the Makefile? or, is there an additonal step req'd?