• Sean Young's avatar
    bpf: fix attach type BPF_LIRC_MODE2 dependency wrt CONFIG_CGROUP_BPF · fdb5c453
    Sean Young authored
    If the kernel is compiled with CONFIG_CGROUP_BPF not enabled, it is not
    possible to attach, detach or query IR BPF programs to /dev/lircN devices,
    making them impossible to use. For embedded devices, it should be possible
    to use IR decoding without cgroups or CONFIG_CGROUP_BPF enabled.
    This change requires some refactoring, since bpf_prog_{attach,detach,query}
    functions are now always compiled, but their code paths for cgroups need
    moving out. Rather than a #ifdef CONFIG_CGROUP_BPF in kernel/bpf/syscall.c,
    moving them to kernel/bpf/cgroup.c and kernel/bpf/sockmap.c does not
    require #ifdefs since that is already conditionally compiled.
    Fixes: f4364dcf ("media: rc: introduce BPF_PROG_LIRC_MODE2")
    Signed-off-by: default avatarSean Young <sean@mess.org>
    Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
bpf-cgroup.h 8.14 KB