Even if I can build linux-pf, -ck or other custom kernels, mkinitcpio fails on my netbook with the lvm2 HOOK (my disk is on lvm).
$ sudo mkinitcpio -p kernel-netbook
==> Building image from preset: /etc/mkinitcpio.d/kernel-netbook.preset: 'default'
-> -k /boot/vmlinuz-netbook -c /etc/mkinitcpio.conf -g /boot/initramfs-netbook.img
==> Starting build: 3.9.2-netbook
-> Running build hook: [base]
-> Running build hook: [udev]
-> Running build hook: [autodetect]
-> Running build hook: [modconf]
-> Running build hook: [block]
-> Running build hook: [lvm2]
==> ERROR: module not found: `dm-mirror'
-> Running build hook: [userui]
-> Running build hook: [resume]
-> Running build hook: [filesystems]
-> Running build hook: [keyboard]
-> Running build hook: [fsck]
==> Generating module dependencies
==> Creating lzop initcpio image: /boot/initramfs-netbook.img
==> WARNING: errors were encountered during the build. The image may not be complete.