Re: [PATCH bpf v2] samples: bpf: Fix vmlinux.h generation for XDP samples

[Andrii Nakryiko <andrii.nakryiko@gmail.com>]

On Tue, Sep 28, 2021 at 6:47 AM Toke Høiland-Jørgensen <toke@redhat.com> wrote:
>
> Kumar Kartikeya Dwivedi <memxor@gmail.com> writes:
>
> > 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.
> >
> > Cc: Toke Høiland-Jørgensen <toke@redhat.com>
> > Fixes: 384b6b3bbf0d (samples: bpf: Add vmlinux.h generation support)
> > Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
>
> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
>

Applied to bpf, thanks.