[joe@localhost src]$ pwd
/usr/src
[joe@localhost src]$ ls
gspca-1.00.20-1pclos2007/ lzma-4.43-3pclos2009/ squashfs-lzma-3.3-3pclos2007/
linux@ madwifi-0.9.4-9pclos2007/ uvcvideo-0.1.0-0.svn159.1pclos2007/
linux-2.6.22.15.tex2/ ndiswrapper-1.54-1pclos2007/
linux-2.6.26.8.tex3/ rpm/
[joe@localhost src]$
Which kernel are you using? I've got two choices in mine, at the moment:
linux-2.6.26.8.tex3/
linux-2.6.22.15.tex2/
If you are running 2009.2 you should use this, I think:
/usr/src/linux-2.6.26.8.tex3/
if you have the kernel source installed?