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[YOCTO #2788] The system will be hung when udhcpc starts, if nfs is mounted at "/" directory and default route is different after starting udhcpc. The cause is that root_is_nfs() does not work after kernel-2.6.37, since the device name has been changed from /dev/root to ${IPADDR}:${NFSDIR} on /proc/mounts. which leads to remove the default routes to nfs server, Now we use a loose match to check if rootfs is nfs. (From OE-Core rev: 9921cb0104ea36daf909c110bb6767e5fd307da0) Signed-off-by: Roy.Li <rongqing.li@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>