x86: use PARTUUID instead explicitly specifying the device by default

This changes the x86 image generation to match x86_64, using the PARTUUID for
the rootfs instead of explicitly configuring the device.

It unbreaks KVM with VirtIO, which uses /dev/vda2 instead of /dev/sda2.

Tested in QEMU/KVM with VirtIO, VirtualBox and VMware.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

SVN-Revision: 44966

target/linux/x86/base-files/lib/preinit/79_move_config

@@ -1,21 +1,14 @@
 #!/bin/sh
-# Copyright (C) 2012 OpenWrt.org
+# Copyright (C) 2012-2015 OpenWrt.org
 
 move_config() {
-	local rootfsdev
-	local rootfstype
-	
-	rootfstype="$(awk 'BEGIN { RS=" "; FS="="; } ($1 == "rootfstype") { print $2 }' < /proc/cmdline)"
-	case "$rootfstype" in
-		squashfs|jffs2)
-			rootfsdev="$(awk 'BEGIN { RS=" "; FS="="; } ($1 == "block2mtd.block2mtd") { print substr($2,1,index($2, ",")-1) }' < /proc/cmdline)";;
-		ext4)
-			rootfsdev="$(awk 'BEGIN { RS=" "; FS="="; } ($1 == "root") { print $2 }' < /proc/cmdline)";;
-	esac
+	. /lib/upgrade/platform.sh
 
-	mount -t ext4 -o rw,noatime "${rootfsdev%[0-9]}1" /mnt
-	mv -f /mnt/sysupgrade.tgz /
-	umount /mnt
+	if platform_export_bootpart; then
+		mount -t ext4 -o rw,noatime "$BOOTPART" /mnt
+		mv -f /mnt/sysupgrade.tgz /
+		umount /mnt
+	fi
 }
 
 boot_hook_add preinit_mount_root move_config