grub2/grub2-suse-remove-linux-root-param.patch

--- a/util/grub-mkconfig.in
+++ b/util/grub-mkconfig.in
@@ -296,7 +296,8 @@
   GRUB_DISABLE_SUBMENU \
   GRUB_CMDLINE_LINUX_RECOVERY \
   SUSE_BTRFS_SNAPSHOT_BOOTING \
-  SUSE_CMDLINE_XENEFI
+  SUSE_CMDLINE_XENEFI \
+  SUSE_REMOVE_LINUX_ROOT_PARAM
 
 if test "x${grub_cfg}" != "x"; then
   rm -f "${grub_cfg}.new"
--- a/util/grub.d/10_linux.in
+++ b/util/grub.d/10_linux.in
@@ -74,7 +74,7 @@
 	else
 	rootsubvol="`make_system_path_relative_to_its_root /`"
 	rootsubvol="${rootsubvol#/}"
-	if [ "x${rootsubvol}" != x ]; then
+	if [ "x${rootsubvol}" != x ] && [ "x$SUSE_REMOVE_LINUX_ROOT_PARAM" != "xtrue" ]; then
 	    GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}"
 	fi
 	fi;;
@@ -85,6 +85,10 @@
 	;;
 esac
 
+if [ "x$SUSE_REMOVE_LINUX_ROOT_PARAM" = "xtrue" ]; then
+  LINUX_ROOT_DEVICE=""
+fi
+
 title_correction_code=
 
 hotkey=1
--- a/util/grub.d/20_linux_xen.in
+++ b/util/grub.d/20_linux_xen.in
@@ -98,7 +98,7 @@
 	else
 	rootsubvol="`make_system_path_relative_to_its_root /`"
 	rootsubvol="${rootsubvol#/}"
-	if [ "x${rootsubvol}" != x ]; then
+	if [ "x${rootsubvol}" != x ] && [ "x$SUSE_REMOVE_LINUX_ROOT_PARAM" != "xtrue" ]; then
 	    GRUB_CMDLINE_LINUX="rootflags=subvol=${rootsubvol} ${GRUB_CMDLINE_LINUX}"
 	fi
 	fi;;
@@ -109,6 +109,10 @@
 	;;
 esac
 
+if [ "x$SUSE_REMOVE_LINUX_ROOT_PARAM" = "xtrue" ]; then
+  LINUX_ROOT_DEVICE=""
+fi
+
 title_correction_code=
 
 grub2_unquote ()
--- a/util/s390x/zipl2grub.pl.in
+++ b/util/s390x/zipl2grub.pl.in
@@ -384,9 +384,13 @@
     } else {
       $v = "";
     }
-    if ($k eq "GRUB_DEVICE" && $v !~ /^UUID/ && ! -e $v) {
-      s{root=\@$k\@}{}g;
-      next;
+    if ($k eq "GRUB_DEVICE") {
+      if (($v !~ /^UUID/ && ! -e $v) ||
+          (exists( $C{SUSE_REMOVE_LINUX_ROOT_PARAM}) &&
+          $C{SUSE_REMOVE_LINUX_ROOT_PARAM} eq "true")) {
+        s{root=\@$k\@}{}g;
+        next;
+      }
     }
     s{\@$k\@}{$v}g;
   }