x86: add grub2 iso support

[openwrt/staging/yousong.git] / target / linux / x86 / base-files / lib / preinit / 20_check_iso

check_for_iso() {
        grep -qE '/dev/root.*iso9660' /proc/mounts && ramoverlay
}

boot_hook_add preinit_mount_root check_for_iso