Index: gcc/doc/invoke.texi
===================================================================
--- gcc/doc/invoke.texi	(revision 119963)
+++ gcc/doc/invoke.texi	(working copy)
@@ -255,7 +255,8 @@ Objective-C and Objective-C++ Dialects}.
 
 @item C-only Warning Options
 @gccoptlist{-Wbad-function-cast  -Wmissing-declarations @gol
--Wmissing-prototypes  -Wnested-externs  -Wold-style-definition @gol
+-Wmissing-parameter-type  -Wmissing-prototypes @gol
+-Wnested-externs  -Wold-style-definition @gol
 -Wstrict-prototypes  -Wtraditional  -Wtraditional-conversion @gol
 -Wdeclaration-after-statement -Wpointer-sign}
 
@@ -2907,13 +2908,10 @@ designated initializers (@pxref{Designat
 Initializers}).  This warning can be independently controlled by
 @option{-Woverride-init}.
 
-@item
+@item @r{(C only)}
 A function parameter is declared without a type specifier in K&R-style
-functions:
-
-@smallexample
-void foo(bar) @{ @}
-@end smallexample
+functions.  This warning can be independently controlled by
+@option{-Wmissing-parameter-type}.
 
 @item
 An empty body occurs in an @samp{if} or @samp{else} statement. This
@@ -3214,6 +3212,17 @@ types.)
 Warn if an old-style function definition is used.  A warning is given
 even if there is a previous prototype.
 
+@item -Wmissing-parameter-type @r{(C only)}
+@opindex Wmissing-parameter-type
+A function parameter is declared without a type specifier in K&R-style
+functions:
+
+@smallexample
+void foo(bar) @{ @}
+@end smallexample
+
+This warning is also enabled by @option{-Wextra}.
+
 @item -Wmissing-prototypes @r{(C only)}
 @opindex Wmissing-prototypes
 Warn if a global function is defined without a previous prototype
Index: gcc/c-decl.c
===================================================================
--- gcc/c-decl.c	(revision 119963)
+++ gcc/c-decl.c	(working copy)
@@ -6414,8 +6414,8 @@ store_parm_decls_oldstyle (tree fndecl, 
 
 	  if (flag_isoc99)
 	    pedwarn ("type of %q+D defaults to %<int%>", decl);
-	  else if (extra_warnings)
-	    warning (OPT_Wextra, "type of %q+D defaults to %<int%>", decl);
+	  else 
+	    warning (OPT_Wmissing_parameter_type, "type of %q+D defaults to %<int%>", decl);
 	}
 
       TREE_PURPOSE (parm) = decl;
Index: gcc/c.opt
===================================================================
--- gcc/c.opt	(revision 119963)
+++ gcc/c.opt	(working copy)
@@ -279,6 +279,10 @@ Wmissing-include-dirs
 C ObjC C++ ObjC++
 Warn about user-specified include directories that do not exist
 
+Wmissing-parameter-type
+C ObjC Var(warn_missing_parameter_type) Init(-1)
+Warn about function parameters declared without a type specifier in K&R-style functions
+
 Wmissing-prototypes
 C ObjC Var(warn_missing_prototypes)
 Warn about global functions without prototypes
Index: gcc/c-opts.c
===================================================================
--- gcc/c-opts.c	(revision 119963)
+++ gcc/c-opts.c	(working copy)
@@ -1025,9 +1025,11 @@ c_common_post_options (const char **pfil
   if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
     flag_exceptions = 1;
 
-  /* -Wextra implies -Wempty-body, -Wsign-compare, 
-     -Wmissing-field-initializers and -Woverride-init, 
+  /* -Wextra implies -Wmissing-parameter-type, -Wempty-body, 
+     -Wsign-compare, -Wmissing-field-initializers and -Woverride-init, 
      but not if explicitly overridden.  */
+  if (warn_missing_parameter_type == -1)
+    warn_missing_parameter_type = extra_warnings;
   if (warn_empty_body == -1)
     warn_empty_body = extra_warnings;
   if (warn_sign_compare == -1)