571fa247ab
Generate vmlinux.h only from the in-tree vmlinux, and remove enum declarations that would cause a build failure in case of version mismatches. There are now two options when building the samples: 1. Compile the kernel to use in-tree vmlinux for vmlinux.h 2. Override VMLINUX_BTF for samples using something like this: make VMLINUX_BTF=/sys/kernel/btf/vmlinux -C samples/bpf This change was tested with relative builds, e.g. cases like: * make O=build -C samples/bpf * make KBUILD_OUTPUT=build -C samples/bpf * make -C samples/bpf * cd samples/bpf && make When a suitable VMLINUX_BTF is not found, the following message is printed: /home/kkd/src/linux/samples/bpf/Makefile:333: *** Cannot find a vmlinux for VMLINUX_BTF at any of " ./vmlinux", build the kernel or set VMLINUX_BTF variable. Stop. Fixes: 384b6b3bbf0d (samples: bpf: Add vmlinux.h generation support) Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210928054608.1799021-1-memxor@gmail.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.