I write an out-of-tree module and now want to export its ioctls to userspace by installing a header that my modules includes, I was looking for how to do it but can't get it.. I was trying header-y from https://www.kernel.org/doc/Documentation/kbuild/makefiles.txt but got: make[1]: *** No rule to make target 'headers_install'. Stop. Here is what I'm trying: https://gist.github.com/gkos/b0bc4e29a3147b0e6d3b I see on kernel that usually the exported headers go in include/uapi/SOMETHING and are declared on include/uapi/Kbuild.. but have no idea if this may work for out-of-tree modules, the headers_install exists on linux Makefile so the 'No rule to make target 'headers_install'' doesn't make sense to me .. I try follow headers_install target on kernel's Makefile but only got frustraded :( Any idea? ps: I compiled the module but don't loaded it, so it may have mistakes Thanks in advance! Cheers!