> > I'm sure this is something embarrassingly obvious > but ...? > Ah - I've worked out what was wrong! I had deleted the "linux" symlink in /usr/src before compiling loop.o, and I didn't specify LINUX_SOURCE explicitly as a "make" command switch. My thanks for everybody's patience. Not sure whether the fault was one or both of these, but after re-doing with the symlink back in and LINUX_SOURCE specified, I now have a working loop.o on this kernel, without doing any dubious manipulations. One more thing though (sorry!): The debian source came from www.backports.org and was kernel-source-2.4.26_2.4.26-6_all.deb. In fact I was actually looking for the deb source for the downloaded kernel image from the same place, which was kernel_image-2.4.26-1-386_2.4.26-5.backports.org.1_i386.deb That kernel source was all that was there for 2.4.26. I posted to the backports mail list to check that I did in fact have the right source, and was told that this source did in fact pertain to my downloaded kernel image, despite the fact that one has a "-5" and the other a "-6" in the handles. I didn't follow the explanation as to why there were different numbers: one had been rebuilt and the other hadn't been, or something. "fakesource" then created source code from this with the directory name /usr/src/kernel-source-2.4.26-1-386. But the kernel that actually runs from kernel_image-2.4.26-1-386_2.4.26-5.backports.org.1_i386.deb is (according to uname -r) 2.4.27-2-386 (note the "2"). This led to a warning at the end of building loop-aes-ciphers that the modules were built for 2.4.26-1-386 but the running kernel was 2.4.26-2-386 and that these wouldn't run (although they do). How significant are these appended kernel build numbers on the same version kernel, especially when one or both numbers have been generated by fakesource/backports? Should I still be concerned? - all tests have been passed so far. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - Linux-crypto: cryptography in and on the Linux system Archive: http://mail.nl.linux.org/linux-crypto/