926         let supported = FsOptions::ASYNC_READ  in init()
927             | FsOptions::PARALLEL_DIROPS  in init()
928             | FsOptions::BIG_WRITES  in init()
929             | FsOptions::AUTO_INVAL_DATA  in init()
930             | FsOptions::HANDLE_KILLPRIV  in init()
931             | FsOptions::ASYNC_DIO  in init()
932             | FsOptions::HAS_IOCTL_DIR  in init()
933             | FsOptions::DO_READDIRPLUS  in init()
934             | FsOptions::READDIRPLUS_AUTO  in init()
935             | FsOptions::ATOMIC_O_TRUNC  in init()
936             | FsOptions::MAP_ALIGNMENT;  in init()
938         let capable = FsOptions::from_bits_truncate(flags);  in init()
946                 if enabled.contains(FsOptions::WRITEBACK_CACHE) {  in init()
947                     enabled.remove(FsOptions::HANDLE_KILLPRIV);  in init()
951                 if enabled.contains(FsOptions::ZERO_MESSAGE_OPEN) {  in init()
952                     enabled.remove(FsOptions::ATOMIC_O_TRUNC);  in init()