EXT_SFBUF
case EXT_SFBUF:
case EXT_SFBUF: type = "EXT_SFBUF"; break;
EXT_SFBUF);
case EXT_SFBUF:
m0->m_ext.ext_type = EXT_SFBUF;
KASSERT(m->m_flags & M_EXT && m->m_ext.ext_type == EXT_SFBUF,