a-ststio.adb, [...]: Further code clean up of previous change.

	* a-ststio.adb, s-direio.adb: Further code clean up of previous change.
	Update comments.

From-SVN: r136023

gcc/ada/a-ststio.adb

@@ -101,11 +101,8 @@ package body Ada.Streams.Stream_IO is
    -----------
 
    procedure Close (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Close (AFCB'Access);
+      FIO.Close (AP (File)'Unrestricted_Access);
    end Close;
 
    ------------
@@ -140,11 +137,8 @@ package body Ada.Streams.Stream_IO is
    ------------
 
    procedure Delete (File : in out File_Type) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
-      FIO.Delete (AFCB'Access);
+      FIO.Delete (AP (File)'Unrestricted_Access);
    end Delete;
 
    -----------------
@@ -357,9 +351,6 @@ package body Ada.Streams.Stream_IO is
    --------------
 
    procedure Set_Mode (File : in out File_Type; Mode : File_Mode) is
-      AFCB : aliased AP;
-      for AFCB'Address use File'Address;
-      pragma Import (Ada, AFCB);
    begin
       FIO.Check_File_Open (AP (File));
 
@@ -371,7 +362,7 @@ package body Ada.Streams.Stream_IO is
       if ((File.Mode = FCB.In_File) /= (Mode = In_File))
         and then not File.Update_Mode
       then
-         FIO.Reset (AFCB'Access, FCB.Inout_File);
+         FIO.Reset (AP (File)'Unrestricted_Access, FCB.Inout_File);
          File.Update_Mode := True;
       end if;
 

gcc/ada/s-direio.adb

@@ -252,6 +252,9 @@ package body System.Direct_IO is
 
    procedure Reset (File : in out File_Type; Mode : FCB.File_Mode) is
       pragma Unmodified (File);
+      --  File is actually modified via Unrestricted_Access below, but
+      --  GNAT will generate a warning anyway.
+
    begin
       FIO.Reset (AP (File)'Unrestricted_Access, Mode);
       File.Index := 1;
@@ -260,6 +263,9 @@ package body System.Direct_IO is
 
    procedure Reset (File : in out File_Type) is
       pragma Unmodified (File);
+      --  File is actually modified via Unrestricted_Access below, but
+      --  GNAT will generate a warning anyway.
+
    begin
       FIO.Reset (AP (File)'Unrestricted_Access);
       File.Index := 1;