diff --git a/prebuilt/common/bin/backuptool.sh b/prebuilt/common/bin/backuptool.sh
index 4a99e42..d925eb5 100755
--- a/prebuilt/common/bin/backuptool.sh
+++ b/prebuilt/common/bin/backuptool.sh
@@ -33,42 +33,12 @@
 check_prereq() {
 # If there is no build.prop file the partition is probably empty.
 if [ ! -r $S/build.prop ]; then
-    return 0
+    exit 127
 fi
 if ! grep -q "^ro.lineage.version=$V.*" $S/build.prop; then
   echo "Not backing up files from incompatible version: $V"
-  return 0
+  exit 127
 fi
-return 1
-}
-
-check_blacklist() {
-  if [ -f $S/addon.d/blacklist -a -d /$1/addon.d/ ]; then
-      ## Discard any known bad backup scripts
-      for f in /$1/addon.d/*sh; do
-          [ -f $f ] || continue
-          s=$(md5sum $f | cut -c-32)
-          grep -q $s $S/addon.d/blacklist && rm -f $f
-      done
-  fi
-}
-
-check_whitelist() {
-  found=0
-  if [ -f $S/addon.d/whitelist ];then
-      ## forcefully keep any version-independent stuff
-      cd /$1/addon.d/
-      for f in *sh; do
-          s=$(md5sum $f | cut -c-32)
-          grep -q $s $S/addon.d/whitelist
-          if [ $? -eq 0 ]; then
-              found=1
-          else
-              rm -f $f
-          fi
-      done
-  fi
-  return $found
 }
 
 # Execute /system/addon.d/*.sh scripts with $1 parameter
@@ -110,13 +80,7 @@
   backup)
     mount_system
     mkdir -p $C
-    if check_prereq; then
-        if check_whitelist $S; then
-            unmount_system
-            exit 127
-        fi
-    fi
-    check_blacklist $S
+    check_prereq
     preserve_addon_d
     run_stage pre-backup
     run_stage backup
@@ -125,13 +89,7 @@
   ;;
   restore)
     mount_system
-    if check_prereq; then
-        if check_whitelist tmp; then
-            unmount_system
-            exit 127
-        fi
-    fi
-    check_blacklist tmp
+    check_prereq
     run_stage pre-restore
     run_stage restore
     run_stage post-restore
diff --git a/prebuilt/common/bin/backuptool_ab.sh b/prebuilt/common/bin/backuptool_ab.sh
index 1765f5d..86bf67a 100755
--- a/prebuilt/common/bin/backuptool_ab.sh
+++ b/prebuilt/common/bin/backuptool_ab.sh
@@ -47,43 +47,13 @@
 check_prereq() {
 # If there is no build.prop file the partition is probably empty.
 if [ ! -r /system/build.prop ]; then
-    return 0
+    exit 127
 fi
 
 grep -q "^ro.lineage.version=$V.*" /system/build.prop && return 1
 
 echo "Not backing up files from incompatible version: $V"
-return 0
-}
-
-check_blacklist() {
-  if [ -f /system/addon.d/blacklist -a -d /$1/addon.d/ ]; then
-      ## Discard any known bad backup scripts
-      cd /$1/addon.d/
-      for f in *sh; do
-          [ -f $f ] || continue
-          s=$(md5sum $f | cut -c-32)
-          grep -q $s /system/addon.d/blacklist && rm -f $f
-      done
-  fi
-}
-
-check_whitelist() {
-  found=0
-  if [ -f /system/addon.d/whitelist ];then
-      ## forcefully keep any version-independent stuff
-      cd /$1/addon.d/
-      for f in *sh; do
-          s=$(md5sum $f | cut -c-32)
-          grep -q $s /system/addon.d/whitelist
-          if [ $? -eq 0 ]; then
-              found=1
-          else
-              rm -f $f
-          fi
-      done
-  fi
-  return $found
+exit 127
 }
 
 # Execute /system/addon.d/*.sh scripts with $1 parameter
@@ -104,24 +74,14 @@
 case "$1" in
   backup)
     mkdir -p $C
-    if check_prereq; then
-        if check_whitelist postinstall/system; then
-            exit 127
-        fi
-    fi
-    check_blacklist postinstall/system
+    check_prereq
     preserve_addon_d
     run_stage pre-backup
     run_stage backup
     run_stage post-backup
   ;;
   restore)
-    if check_prereq; then
-        if check_whitelist postinstall/tmp; then
-            exit 127
-        fi
-    fi
-    check_blacklist postinstall/tmp
+    check_prereq
     run_stage pre-restore
     run_stage restore
     run_stage post-restore
diff --git a/prebuilt/common/bin/blacklist b/prebuilt/common/bin/blacklist
deleted file mode 100644
index 03c36c4..0000000
--- a/prebuilt/common/bin/blacklist
+++ /dev/null
@@ -1,4 +0,0 @@
-80f99c594f7b82c4cbe533e3f5447729
-29f4bab6bae5959458678869350dc888
-77d73f73da664f3592e712b7e7c107c1
-a5019b358023a3a6ae8be3f3380ba5ca
diff --git a/prebuilt/common/bin/whitelist b/prebuilt/common/bin/whitelist
deleted file mode 100644
index ca3f017..0000000
--- a/prebuilt/common/bin/whitelist
+++ /dev/null
@@ -1 +0,0 @@
-b0a27bcb5c7504a81e1450a8313e37cb