- u_char
- u_int
- u_long
- u_short
- uch
- udp_check
- udp_close
- udp_connect
- udp_err
- udp_header
- udp_ioctl
- udp_loopback
- udp_rcv
- udp_read
- udp_recvfrom
- udp_select
- udp_send_check
- udp_sendto
- udp_write
- uid_t
- uint
- ulcolor
- ulg
- ulong
- ultrastor_abort
- ultrastor_biosparam
- ultrastor_detect
- ultrastor_info
- ultrastor_interrupt
- ultrastor_queuecommand
- ultrastor_reset
- ultrastor_sg_list
- umode_t
- unalt
- unblank_screen
- uncaps
- unchar
- unctrl
- underline
- unexpected_floppy_interrupt
- unexpected_hd_interrupt
- unix_data_alloc
- unix_data_deref
- unix_data_lookup
- unix_data_ref
- unix_proto_accept
- unix_proto_bind
- unix_proto_connect
- unix_proto_create
- unix_proto_data
- unix_proto_dup
- unix_proto_getname
- unix_proto_getsockopt
- unix_proto_init
- unix_proto_ioctl
- unix_proto_listen
- unix_proto_read
- unix_proto_recv
- unix_proto_recvfrom
- unix_proto_release
- unix_proto_select
- unix_proto_send
- unix_proto_sendto
- unix_proto_setsockopt
- unix_proto_shutdown
- unix_proto_socketpair
- unix_proto_write
- unixify_text_buffer
- unlock_buffer
- unlock_creation
- unlock_fat
- unlock_inode
- unlock_it
- unlock_skb
- unlock_super
- unlshift
- unmap_page_range
- unrshift
- unzip
- update_attr
- update_screen
- update_timeout
- updcrc
- usage
- user
- user_i387_struct
- ush
- ushort
- ustat
- utimbuf