netns_id in bpf_sk_lookup_{tcp,udp}

[David Ahern]

Hi Joe:

The netns_id to the bpf_sk_lookup_{tcp,udp} functions in
net/core/filter.c is a u64, yet the APIs in include/uapi/linux/bpf.h
shows a u32. Is that intentional or an oversight through the iterations?

David