> So partial_name_hash() like I used it in this patch series is enough? I think partial_name_hash() is enough for 8/16/21bit characters. Another point about the discrimination of 21bit characters: I think that checking in exfat_toupper () can be more simplified. ex: return a < PLANE_SIZE && sbi->vol_utbl[a] ? sbi->vol_utbl[a] : a; --- Kohada Tetsuhiro <Kohada.Tetsuhiro@xxxxxxxxxxxxxxxxxxxxxxxxxxx>