Given we recently extended the original bpf_map_area_alloc() helper in
commit fc970227 ("bpf: Add mmap() support for BPF_MAP_TYPE_ARRAY"),
we need to apply the same logic as in ff1c08e1 ("bpf: Change size
to u64 for bpf_map_{area_alloc, charge_init}()"). To avoid conflicts,
extend it for bpf-next.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>