Looks like ubuntu includes some other patch which conflicts with the dmraid45 patch. You could try patching a vanilla 2.6.22.x kernel or disabling CONFIG_DM_MIRROR option (if you don't need RAID1).
Looks like ubuntu includes some other patch which conflicts with the dmraid45 patch. You could try patching a vanilla 2.6.22.x kernel or disabling CONFIG_DM_MIRROR option (if you don't need RAID1).