Man pages matching name dmmp_mpath_kdev_name_get in section 3:

dmmp_mpath_kdev_name_get.3.en	debian 10 / multipath-tools
dmmp_mpath_kdev_name_get.3.en	debian 11 / multipath-tools
dmmp_mpath_kdev_name_get.3.en	debian 12 / multipath-tools