> > Can I get rid of some of these guys?  How?
> 
> You can get rid of the superfluous interfaces by building yourself a
> custom kernel with the drivers for those devices commented out.  Be
> sure and check the man pages (eg sl(4), ppp(4), faith(4)) and in LINT
> (4.x) or NOTES (5.x) to verify you aren't chopping out something
> useful.  Nb. the ppp0 interface can only be generated by the kernel
> pppd(8). The userland ppp(8) which is completely independent of the
> kernel mode ppp uses tun0... interfaces that are dynamically generated
> as required -- this daemon is what most people use for dial-up
> purposes.

OK, I had read the kernel config part of the manual before, but I
re-read it to refresh my memory.
I'm currently running a custom kernel, with just the cpu specified and
maxusers = 0

I edited a new copy of that, took out quite a bit more that I don't need
- raid, scsi, wi-fi, pcmcia, etc.
I did:
# cd /usr/src/sys/i386/conf
# /usr/sbin/config CUSTOM1
# cd ../../compile/CUSTOM1
# make clean
# make depend
# make

FAILURE!

Last line of output:
Umass.o(.text+0x1c13): more undefined references to 'xpt_done' follow

*** Error Code 1
Stop in /usr/src/sys/compile/CUSTOM1


Assuming that the error is in my editing of the kernel config file, I
have added it below.
Any advice would be appreciated!


#
# CUSTOM1 -- Custom kernel configuration file for FreeBSD/i386
#
# For more information on this file, please read the handbook section on
# Kernel Configuration Files:
#
#
http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-c
onfig.html
#
# The handbook is also available locally in /usr/share/doc/handbook
# if you've installed the doc distribution, otherwise always see the
# FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
# latest information.
#
# An exhaustive list of options and more detailed explanations of the
# device lines is also present in the ./LINT configuration file. If you
are
# in doubt as to the purpose or necessity of a line, check first in
LINT.
#
# $FreeBSD: src/sys/i386/conf/GENERIC,v 1.246.2.51.2.2 2003/03/25
23:35:15 jhb Exp $

machine         i386
#cpu            I386_CPU
#cpu            I486_CPU
#cpu            I586_CPU
cpu             I686_CPU
ident           CUSTOM1
maxusers        0

#makeoptions    DEBUG=-g                #Build kernel with gdb(1) debug
symbols

options         MATH_EMULATE            #Support for x87 emulation
options         INET                    #InterNETworking
options         INET6                   #IPv6 communications protocols
options         FFS                     #Berkeley Fast Filesystem
options         FFS_ROOT                #FFS usable as root device [keep
this!]
options         SOFTUPDATES             #Enable FFS soft updates support
options         UFS_DIRHASH             #Improve performance on big
directories
options         MFS                     #Memory Filesystem
options         MD_ROOT                 #MD is a potential root device
options         NFS                     #Network Filesystem
options         NFS_ROOT                #NFS usable as root device, NFS
required
options         MSDOSFS                 #MSDOS Filesystem
options         CD9660                  #ISO 9660 Filesystem
options         CD9660_ROOT             #CD-ROM usable as root, CD9660
required
options         PROCFS                  #Process filesystem
options         COMPAT_43               #Compatible with BSD 4.3 [KEEP
THIS!]
options         SCSI_DELAY=15000        #Delay (in ms) before probing
SCSI
options         UCONSOLE                #Allow users to grab the console
options         USERCONFIG              #boot -c editor
options         VISUAL_USERCONFIG       #visual boot -c editor
options         KTRACE                  #ktrace(1) support
options         SYSVSHM                 #SYSV-style shared memory
options         SYSVMSG                 #SYSV-style message queues
options         SYSVSEM                 #SYSV-style semaphores
options         P1003_1B                #Posix P1003_1B real-time
extensions
options         _KPOSIX_PRIORITY_SCHEDULING
options         ICMP_BANDLIM            #Rate limit bad replies
options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
options         AHC_REG_PRETTY_PRINT    # Print register bitfields in
debug
                                        # output.  Adds ~128k to driver.
options         AHD_REG_PRETTY_PRINT    # Print register bitfields in
debug 
                                        # output.  Adds ~215k to driver.

# To make an SMP kernel, the next two are needed
#options        SMP                     # Symmetric MultiProcessor
Kernel
#options        APIC_IO                 # Symmetric (APIC) I/O

# To support HyperThreading, HTT is needed in addition to SMP and
APIC_IO
#options        HTT                     # HyperThreading Technology

device          isa
device          eisa
device          pci

# Floppy drives
device          fdc0    at isa? port IO_FD1 irq 6 drq 2
device          fd0     at fdc0 drive 0
#device         fd1     at fdc0 drive 1
#
# If you have a Toshiba Libretto with its Y-E Data PCMCIA floppy,
# don't use the above line for fdc0 but the following one:
#device         fdc0

# ATA and ATAPI devices
device          ata0    at isa? port IO_WD1 irq 14
device          ata1    at isa? port IO_WD2 irq 15
device          ata
device          atadisk                 # ATA disk drives
device          atapicd                 # ATAPI CDROM drives
device          atapifd                 # ATAPI floppy drives
device          atapist                 # ATAPI tape drives
options         ATA_STATIC_ID           #Static device numbering

# SCSI Controllers
#device         ahb             # EISA AHA1742 family
#device         ahc             # AHA2940 and onboard AIC7xxx devices
#device         ahd             # AHA39320/29320 and onboard AIC79xx
devices
#device         amd             # AMD 53C974 (Tekram DC-390(T))
#device         isp             # Qlogic family
#device         mpt             # LSI-Logic MPT/Fusion
#device         ncr             # NCR/Symbios Logic
#device         sym             # NCR/Symbios Logic (newer chipsets)
#options        SYM_SETUP_LP_PROBE_MAP=0x40
                                # Allow ncr to attach legacy NCR devices
when 
                                # both sym and ncr are configured

#device         adv0    at isa?
#device         adw
#device         bt0     at isa?
#device         aha0    at isa?
#device         aic0    at isa?

#device         ncv             # NCR 53C500
#device         nsp             # Workbit Ninja SCSI-3
#device         stg             # TMC 18C30/18C50

# SCSI peripherals
#device         scbus           # SCSI bus (required)
#device         da              # Direct Access (disks)
#device         sa              # Sequential Access (tape etc)
#device         cd              # CD
#device         pass            # Passthrough device (direct SCSI
access)

# RAID controllers interfaced to the SCSI subsystem
#device         asr             # DPT SmartRAID V, VI and Adaptec SCSI
RAID
#device         dpt             # DPT Smartcache - See LINT for options!
#device         iir             # Intel Integrated RAID
#device         mly             # Mylex AcceleRAID/eXtremeRAID
#device         ciss            # Compaq SmartRAID 5* series

# RAID controllers
#device         aac             # Adaptec FSA RAID, Dell PERC2/PERC3
#device         aacp            # SCSI passthrough for aac (requires
CAM)
#device         ida             # Compaq Smart RAID
#device         amr             # AMI MegaRAID
#device         mlx             # Mylex DAC960 family
#device         twe             # 3ware Escalade

# atkbdc0 controls both the keyboard and the PS/2 mouse
device          atkbdc0 at isa? port IO_KBD
device          atkbd0  at atkbdc? irq 1 flags 0x1
device          psm0    at atkbdc? irq 12

device          vga0    at isa?

# splash screen/screen saver
pseudo-device   splash

# syscons is the default console driver, resembling an SCO console
device          sc0     at isa? flags 0x100

# Enable this and PCVT_FREEBSD for pcvt vt220 compatible console driver
#device         vt0     at isa?
#options        XSERVER                 # support for X server on a vt
console
#options        FAT_CURSOR              # start with block cursor
# If you have a ThinkPAD, uncomment this along with the rest of the PCVT
lines
#options        PCVT_SCANSET=2          # IBM keyboards are non-std

device          agp             # support several AGP chipsets

# Floating point support - do not disable.
device          npx0    at nexus? port IO_NPX irq 13

# Power management support (see LINT for more options)
device          apm0    at nexus? disable flags 0x20 # Advanced Power
Management

# PCCARD (PCMCIA) support
#device         card
#device         pcic0   at isa? irq 0 port 0x3e0 iomem 0xd0000
#device         pcic1   at isa? irq 0 port 0x3e2 iomem 0xd4000 disable

# Serial (COM) ports
device          sio0    at isa? port IO_COM1 flags 0x10 irq 4
device          sio1    at isa? port IO_COM2 irq 3
device          sio2    at isa? disable port IO_COM3 irq 5
device          sio3    at isa? disable port IO_COM4 irq 9

# Parallel port
device          ppc0    at isa? irq 7
device          ppbus           # Parallel port bus (required)
device          lpt             # Printer
device          plip            # TCP/IP over parallel
device          ppi             # Parallel port interface device
#device         vpo             # Requires scbus and da


# PCI Ethernet NICs.
#device         de              # DEC/Intel DC21x4x (``Tulip'')
#device         em              # Intel PRO/1000 adapter Gigabit
Ethernet Card (``Wiseman'')
#device         txp             # 3Com 3cR990 (``Typhoon'')
#device         vx              # 3Com 3c590, 3c595 (``Vortex'')

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these
NICs!
device          miibus          # MII bus support
#device         dc              # DEC/Intel 21143 and various workalikes
#device         fxp             # Intel EtherExpress PRO/100B (82557,
82558)
#device         pcn             # AMD Am79C97x PCI 10/100 NICs
#device         rl              # RealTek 8129/8139
#device         sf              # Adaptec AIC-6915 (``Starfire'')
#device         sis             # Silicon Integrated Systems SiS 900/SiS
7016
#device         ste             # Sundance ST201 (D-Link DFE-550TX)
#device         tl              # Texas Instruments ThunderLAN
device          tx              # SMC EtherPower II (83c170 ``EPIC'')
#device         vr              # VIA Rhine, Rhine II
#device         wb              # Winbond W89C840F
#device         xl              # 3Com 3c90x (``Boomerang'',
``Cyclone'')
#device         bge             # Broadcom BCM570x (``Tigon III'')

# ISA Ethernet NICs.
# 'device ed' requires 'device miibus'
#device         ed0     at isa? disable port 0x280 irq 10 iomem 0xd8000
#device         ex
#device         ep
#device         fe0     at isa? disable port 0x300
# Xircom Ethernet
#device         xe
# PRISM I IEEE 802.11b wireless NIC.
#device         awi
# WaveLAN/IEEE 802.11 wireless NICs. Note: the WaveLAN/IEEE really
# exists only as a PCMCIA device, so there is no ISA attachment needed
# and resources will always be dynamically assigned by the pccard code.
#device         wi
# Aironet 4500/4800 802.11 wireless NICs. Note: the declaration below
will
# work for PCMCIA and PCI cards, as well as ISA cards set to ISA PnP
# mode (the factory default). If you set the switches on your ISA
# card for a manually chosen I/O address and IRQ, you must specify
# those parameters here.
#device         an
# The probe order of these is presently determined by
i386/isa/isa_compat.c.
#device         ie0     at isa? disable port 0x300 irq 10 iomem 0xd0000
#device         le0     at isa? disable port 0x300 irq 5 iomem 0xd0000
#device         lnc0    at isa? disable port 0x280 irq 10 drq 0
#device         cs0     at isa? disable port 0x300
#device         sn0     at isa? disable port 0x300 irq 10

# Pseudo devices - the number indicates how many units to allocate.
pseudo-device   loop            # Network loopback
pseudo-device   ether           # Ethernet support
#pseudo-device  sl      1       # Kernel SLIP
#pseudo-device  ppp     1       # Kernel PPP
pseudo-device   tun             # Packet tunnel.
pseudo-device   pty             # Pseudo-ttys (telnet etc)
pseudo-device   md              # Memory "disks"
pseudo-device   gif             # IPv6 and IPv4 tunneling
#pseudo-device  faith   1       # IPv6-to-IPv4 relaying (translation)

# The `bpf' pseudo-device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
pseudo-device   bpf             #Berkeley packet filter

# USB support
device          uhci            # UHCI PCI->USB interface
device          ohci            # OHCI PCI->USB interface
device          usb             # USB Bus (required)
device          ugen            # Generic
device          uhid            # "Human Interface Devices"
device          ukbd            # Keyboard
device          ulpt            # Printer
device          umass           # Disks/Mass storage - Requires scbus
and da
device          ums             # Mouse
device          uscanner        # Scanners
device          urio            # Diamond Rio MP3 Player
# USB Ethernet, requires mii
#device         aue             # ADMtek USB ethernet
#device         cue             # CATC USB ethernet
#device         kue             # Kawasaki LSI USB ethernet


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