Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
lguest: don't force VIRTIO_F_NOTIFY_ON_EMPTY
lguest: cleanup for map_switcher()
lguest: use PGDIR_SHIFT for PAE code to allow different PAGE_OFFSET
lguest: use set_pte/set_pmd uniformly for real page table entries
lguest: move panic notifier registration to its expected place.
virtio_blk: add support for cache flush
virtio: add virtio IDs file
virtio: get rid of redundant VIRTIO_ID_9P definition
virtio: make add_buf return capacity remaining
virtio_pci: minor MSI-X cleanups