Kernel Building

Note: it is recommended that you build an RPM (Rebuilding OLPC kernel) unless you are already familiar with kernel development!

Building an OLPC kernel

After obtaining the OLPC source (and if desired, making changes), the following steps can be taken to build a kernel on any Fedora Core 6 machine:

• make oldconfig
• make
• make modules_install # as root
• tar zcvf kern.tar.gz arch/i386/boot/bzImage System.map /lib/modules/$VERS

(Warning, this needs root and will trash your /lib/modules, if you happen to already have same version. Use "make INSTALL_MOD_DIR=/somewhere modules_install" if you want to avoid using root).

Replace $VERS above with the proper kernel version that has been built.

Assuming everything builds correctly, you will be left with kern.tar.gz. This can be copied over to an XO laptop, and the following steps will install the kernel (again, replacing $VERS with the kernel version):

• cd /
• tar zxvf .../kern.tar.gz
• mv System.map /boot/System.map-$VERS
• mv arch/i386/boot/bzImage /boot/vmlinuz-$VERS
• ln -sf /boot/vmlinuz-$VERS /boot/vmlinuz

If not booting off NAND, the additional steps are also necessary:

• mkinitrd /boot/initrd-$VERS.img $VERS
• ln -sf /boot/initrd-$VERS.img /boot/initrd.img