Revert "KVM: use get_task_mm() instead of atomic_inc the mm_count"

This reverts commit 202761268a29d4cd3a3fec35e6d6f2f239374635.  The change
caused a cycle that wouldn't let virtual machines to be deallocated (due to
the mm holding a ref to the file table, which holds a ref to kvm).

Signed-off-by: Avi Kivity <avi@qumranet.com>
1 file changed