base-files: force remount ext4 rootfs

package/base-files/files/lib/preinit/80_mount_root

@@ -18,6 +18,10 @@ do_mount_root() {
 	mount_root
 	boot_run_hook preinit_mount_root
 	[ ! -f /etc/bench.log ] && touch /etc/bench.log
+	have_ro_ext4=$(/bin/cat /proc/mounts |/bin/grep ' / ext4'|/bin/grep 'ro'|/usr/bin/wc -l)
+	if [ "$have_ro_ext4" != "0" ]; then
+		/usr/bin/mount -o remount,rw,noatime /
+	fi
 	[ -f /sysupgrade.tgz -o -f /tmp/sysupgrade.tar ] && {
 		echo "- config restore -"
 		cp /etc/passwd /etc/group /etc/shadow /tmp