Decided to build a smaller kernel for my MSI F725GM-P43 MB Slack 64 bit system, Kernel version
2.6.38.4.

I removed all RAID/LVM entries among other things since they were not enecessary
and ran the build. A few warnings, but nothing referencing RAID/LVM until I reran LILO which gave me
the following:

/proc/misc: No entry for device-mapper found.
Is device-mapper driver missing from kernel?
/proc/devices: No entry for device-mapper found.
Failed to set up list of device-mapper major numbers.

From what I read, it is only necessary for LVM and lack of it
does not interfere with booting or otherwise normal operation.

Is there any way to remove these entries when LILO is run?

Am I going to run into a problem down the line if I don't do something about this?

I see the same thing whenever I re-run lilo after a change. Its been there for a long time - at least two years. I read somewhere that its not a problem, but I can't remember where.

If you enable 'Device mapper support' in the kernel config you do not get those messages. I do not think it is harmful, but some one may come along and correct me.

Yes but I am trying to avoid all RAID/LVM programming such as mdadm and all
the attendant support. I do not want to select RAID just to remove a missing
device-mapper error message in LILO.

Yes I figured that, but since you asked ;-)