__btf_member_bitfield_size
return __btf_member_bitfield_size(t, m);
if (__btf_member_bitfield_size(t, member)) {
bitfield_size = __btf_member_bitfield_size(t, member);
if (__btf_member_bitfield_size(t, member)) {
__btf_member_bitfield_size(t, member);