8 files changed, 9 insertions, 1 deletions
diff --git a/libraries/base/GHC/IO/Encoding/CodePage.hs b/libraries/base/GHC/IO/Encoding/CodePage.hs
index a6b4e95b4b..724b8ae408 100644
--- a/libraries/base/GHC/IO/Encoding/CodePage.hs
+++ b/libraries/base/GHC/IO/Encoding/CodePage.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE CPP, BangPatterns, ForeignFunctionInterface, NoImplicitPrelude,
              NondecreasingIndentation, MagicHash #-}
 module GHC.IO.Encoding.CodePage(
diff --git a/libraries/base/GHC/IO/Encoding/Failure.hs b/libraries/base/GHC/IO/Encoding/Failure.hs
index a27650b00a..08e084d4ff 100644
--- a/libraries/base/GHC/IO/Encoding/Failure.hs
+++ b/libraries/base/GHC/IO/Encoding/Failure.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude, PatternGuards #-}
 -----------------------------------------------------------------------------
 -- |
diff --git a/libraries/base/GHC/IO/Encoding/Iconv.hs b/libraries/base/GHC/IO/Encoding/Iconv.hs
index d91907132c..f8dfb88ae7 100644
--- a/libraries/base/GHC/IO/Encoding/Iconv.hs
+++ b/libraries/base/GHC/IO/Encoding/Iconv.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE CPP
            , NoImplicitPrelude
            , ForeignFunctionInterface
@@ -31,7 +32,7 @@ module GHC.IO.Encoding.Iconv (
 
 #if !defined(mingw32_HOST_OS)
 
-import Foreign hiding (unsafePerformIO)
+import Foreign.Safe
 import Foreign.C
 import Data.Maybe
 import GHC.Base
diff --git a/libraries/base/GHC/IO/Encoding/Latin1.hs b/libraries/base/GHC/IO/Encoding/Latin1.hs
index 197222eaa7..0e3de3922e 100644
--- a/libraries/base/GHC/IO/Encoding/Latin1.hs
+++ b/libraries/base/GHC/IO/Encoding/Latin1.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude
            , BangPatterns
            , NondecreasingIndentation
diff --git a/libraries/base/GHC/IO/Encoding/Types.hs b/libraries/base/GHC/IO/Encoding/Types.hs
index ebce578219..df6ce2f257 100644
--- a/libraries/base/GHC/IO/Encoding/Types.hs
+++ b/libraries/base/GHC/IO/Encoding/Types.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude, ExistentialQuantification #-}
 {-# OPTIONS_GHC -funbox-strict-fields #-}
 
diff --git a/libraries/base/GHC/IO/Encoding/UTF16.hs b/libraries/base/GHC/IO/Encoding/UTF16.hs
index 193222099d..af3cae057d 100644
--- a/libraries/base/GHC/IO/Encoding/UTF16.hs
+++ b/libraries/base/GHC/IO/Encoding/UTF16.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE CPP
            , NoImplicitPrelude
            , BangPatterns
diff --git a/libraries/base/GHC/IO/Encoding/UTF32.hs b/libraries/base/GHC/IO/Encoding/UTF32.hs
index 89a0d11b7f..815f36ca19 100644
--- a/libraries/base/GHC/IO/Encoding/UTF32.hs
+++ b/libraries/base/GHC/IO/Encoding/UTF32.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude
            , BangPatterns
            , NondecreasingIndentation
diff --git a/libraries/base/GHC/IO/Encoding/UTF8.hs b/libraries/base/GHC/IO/Encoding/UTF8.hs
index 55d09c82b1..df3e67b889 100644
--- a/libraries/base/GHC/IO/Encoding/UTF8.hs
+++ b/libraries/base/GHC/IO/Encoding/UTF8.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Trustworthy #-}
 {-# LANGUAGE NoImplicitPrelude
            , BangPatterns
            , NondecreasingIndentation