Revert "kdumpctl: use generated rd.lvm.lv=X"

This reverts commit cb38b32dfc.

We are going to add "--hostonly-cmdline" dracut argument in
the following patch.

With the help of "--hostonly-cmdline", dracut will generate
"rd.lvm.lv=X" for us, no need to implement here again.

Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>

kdumpctl

@@ -175,45 +175,6 @@ check_kdump_cpus()
 	echo " try nr_cpus=$nr_min or larger instead"
 }
 
-# Generate rd.lvm.lv=X for the kdump targets if any.
-generate_lvm_cmdlines()
-{
-	local lvm_cmdlines=""
-
-	generate_lvm_cmdline() {
-		local majmin=$1 dev
-
-		[ -d "/sys/dev/block/$majmin/dm" ] || return 0
-		dev=/dev/mapper/$(< "/sys/dev/block/$majmin/dm/name")
-
-		vg=$(lvm lvs --rows $dev -o vg_name --separator=* 2>/dev/null | cut -d "*" -f 2)
-		lv=$(lvm lvs --rows $dev -o lv_name --separator=* 2>/dev/null | cut -d "*" -f 2)
-		if [ -n "$vg" -a -n "$lv" ]; then
-			lvm_cmdlines="rd.lvm.lv=$vg/$lv $lvm_cmdlines"
-		fi
-
-		return 0
-	}
-
-	for_each_block_target_all generate_lvm_cmdline
-
-	echo "$lvm_cmdlines"
-}
-
-# $1: function name
-for_each_block_target_all()
-{
-    local dev majmin
-
-    for dev in $(get_kdump_targets); do
-        [ -b "$dev" ] || continue
-        majmin=$(get_maj_min $dev)
-        check_block_and_slaves_all $1 $majmin
-    done
-
-    return 0
-}
-
 # This function performs a series of edits on the command line.
 # Store the final result in global $KDUMP_COMMANDLINE.
 prepare_cmdline()
@@ -233,19 +194,15 @@ prepare_cmdline()
 
 	# Always remove "root=X", as we now explicitly generate all kinds
 	# of dump target mount information including root fs. But we can
-	# not remove it in case of "default dump_to_rootfs".
+	# not remove it in case of fadump or "default dump_to_rootfs".
 	#
 	# We do this before KDUMP_COMMANDLINE_APPEND, if one really cares
 	# about it(e.g. for debug purpose), then can pass "root=X" using
 	# KDUMP_COMMANDLINE_APPEND.
-	if ! is_dump_to_rootfs; then
+	if [ $DEFAULT_DUMP_MODE != "fadump" ] && ! is_dump_to_rootfs; then
 		cmdline=`remove_cmdline_param "$cmdline" root`
 	fi
 
-	# Remove all the inherited rd.lvm.lv=X and generate those as needed.
-	cmdline=`remove_cmdline_param "$cmdline" rd.lvm.lv`
-	cmdline="${cmdline} $(generate_lvm_cmdlines)"
-
 	cmdline="${cmdline} ${KDUMP_COMMANDLINE_APPEND}"
 
 	id=`get_bootcpu_apicid`