Since I should document this somewhere, here's the procedure
for building the Slackware kernel package. I do not patch the official
kernel sources, but it's not exactly a virgin either.

=============================================================
Version specific notes (if any):
=============================================================

For a 2.4.x kernel:

1. Untar Linus' source in /usr/src.
2. mv linux linux-2.x.x (version number)
3. cp -a linux-2.x.x linux-2.x.x.orig
4. ln -sf linux-2.x.x linux
5. cd linux

Insert Slackware's bare.i config:
6. cp kernels/bare.i/config .config
7. make oldconfig
8. make dep ; make clean ; make bzImage ; make clean
9. cd drivers/net/hamradio/soundmodem
rm *
cp -a /usr/src/linux-2.x.x.orig/drivers/net/hamradio/soundmodem/* .
10. cd scripts
rm -r *
cp -a /usr/src/linux-2.x.x.orig/scripts/* .
11. rm -r linux-2.x.x.orig
12. rm linux-2.x.x/.version
13. Lucky step 13 :-)
find . -name ".depend" | xargs rm
find . -name ".hdepend" | xargs rm
find . -name ".??*flags" | xargs rm
rm drivers/sound/.pss_boot.h.boot
rm drivers/sound/.maui_boot.h.boot
rm drivers/sound/.trix_boot.h.boot
rm .config.old

OK, that's it. Now just pack up /usr/src/linux-2.x.x, the
/usr/src/linux symlink, and /install/slack-desc.

For a 2.6.x kernel (much easier):

Untar Linus' source in /usr/src.
Make all files owned by root:root with reasonable perms.
Install a suitable .config, or use make menuconfig, etc.
make oldconfig > /dev/null
make bzImage
make clean
rm .version

That's it!