On Wed, Sep 30, 2020 at 10:13:39PM -0700, Yonghong Song wrote:
> Michal reported a build failure likes below:
> BTFIDS vmlinux
> FAILED unresolved symbol tcp_timewait_sock
> make[1]: *** [/.../linux-5.9-rc7/Makefile:1176: vmlinux] Error 255
>
> This error can be triggered when config has CONFIG_NET enabled
> but CONFIG_INET disabled. In this case, there is no user of
> structs inet_timewait_sock and tcp_timewait_sock and hence vmlinux BTF
> types are not generated for these two structures.
>
> To fix the problem, let us force BTF generation for these two
> structures with BTF_TYPE_EMIT.
Acked-by: Martin KaFai Lau <ka...@fb.com>
