The files /usr/include/linux/ and /usr/include/asm/ are often soft links to the directories where the kernel headers are. They are usually under /usr/src/kernel*/.

If you don't have the kernel sources, download them. Refer to the answer: ("How To Upgrade/Recompile a Kernel.")

Then, use rm to remove any garbage, and ln to create the links:

   $ rm -rf /usr/include/linux /usr/include/asm
   $ ln -sf /usr/src/linux/include/linux /usr/include/linux
   $ ln -sf /usr/src/linux/include/asm /usr/include/asm

/usr/src/linux/include/asm/ is a symbolic link to an architecture-specific asm directory. If you have a freshly unpacked kernel source tree, you must make symlinks. You'll also find that you may need to do `make config' in a newly-unpacked kernel source tree, to create linux/autoconf.h.