Here is the latest version of the news item; this gives a few days notification before the unmasking.
William
Title: udev-181 unmasking Author: William Hubbs <willi...@gentoo.org> Content-Type: text/plain Posted: 2012-03-14 Revision: 1 News-Item-Format: 1.0 Display-If-Installed: <sys-fs/udev-181 udev-181 is being unmasked on 2012-03-17 UTC. This news item is to inform you that once you upgrade to a version of udev >=181, if you have /usr on a separate partition, you must boot your system with an initramfs which pre-mounts /usr. An initramfs which does this is created by >=sys-kernel/genkernel-3.4.25 or >=sys-kernel/dracut-017-r1. If you do not want to use these tools, be sure any initramfs you create pre-mounts /usr. Also, if you are using OpenRC, you must upgrade to >= openrc-0.9.9. For more information on why this has been done, see the following URL: http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken
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