This directory kernel-usr-include, contains a copy of (some of the files from) that gets generated by the kernel via

make headers_install

The make target headers_install, will install sanitised kernel headers to INSTALL_HDR_PATH (default into kernel rootdir under usr/).

These files should also be shipped with the distro, e.g. via package kernel-headers (Fedora). But we cannot depend on the distro shipping a new enough header file. Thus, we keep a copy that it known to work with eBPF programs in this git-repo. These are primarily used when compiling the userspace programs.