diff -urp sources/binutils-2.22/gas/doc/as.texinfo binutils-2.22/gas/doc/as.texinfo
--- sources/binutils-2.22/gas/doc/as.texinfo	2011-08-19 16:48:40.000000000 +0200
+++ binutils-2.22/gas/doc/as.texinfo	2012-03-23 16:59:59.000000000 +0100
@@ -4021,6 +4021,7 @@ Some machine configurations provide addi
 
 * Macro::			@code{.macro @var{name} @var{args}}@dots{}
 * MRI::				@code{.mri @var{val}}
+* Nowarn::                      @code{.nowarn}
 * Noaltmacro::                  @code{.noaltmacro}
 * Nolist::                      @code{.nolist}
 * Octa::                        @code{.octa @var{bignums}}
@@ -4100,6 +4101,7 @@ Some machine configurations provide addi
 * VTableInherit::               @code{.vtable_inherit @var{child}, @var{parent}}
 @end ifset
 
+* Warn::                        @code{.warn}
 * Warning::			@code{.warning @var{string}}
 * Weak::                        @code{.weak @var{names}}
 * Weakref::                     @code{.weakref @var{alias}, @var{symbol}}
@@ -5460,6 +5462,10 @@ If @var{val} is non-zero, this tells @co
 affects code assembled until the next @code{.mri} directive, or until the end
 of the file.  @xref{M, MRI mode, MRI mode}.
 
+@node Nowarn
+@section @code{.nowarn}
+Disable assembler warnings. @xref{Warn}.
+
 @node Noaltmacro
 @section @code{.noaltmacro}
 Disable alternate macro mode.  @xref{Altmacro}.
@@ -6546,6 +6552,10 @@ parent whose addend is the value of the 
 parent name of @code{0} is treated as referring to the @code{*ABS*} section.
 @end ifset
 
+@node Warn
+@section @code{.warn}
+Enable assembler warnings. @xref{Nowarn}.
+
 @node Warning
 @section @code{.warning "@var{string}"}
 @cindex warning directive
diff -urp sources/binutils-2.22/gas/read.c binutils-2.22/gas/read.c
--- sources/binutils-2.22/gas/read.c	2011-11-21 10:29:29.000000000 +0100
+++ binutils-2.22/gas/read.c	2012-03-23 16:55:03.000000000 +0100
@@ -387,6 +387,7 @@ static const pseudo_typeS potable[] = {
   {"noformat", s_ignore, 0},
   {"nolist", listing_list, 0},	/* Turn listing off.  */
   {"nopage", listing_nopage, 0},
+  {"nowarn", s_warn, 0},
   {"octa", cons, 16},
   {"offset", s_struct, 0},
   {"org", s_org, 0},
@@ -446,6 +447,7 @@ static const pseudo_typeS potable[] = {
   {"xdef", s_globl, 0},
   {"xref", s_ignore, 0},
   {"xstabs", s_xstab, 's'},
+  {"warn", s_warn, 1},
   {"warning", s_errwarn, 0},
   {"weakref", s_weakref, 0},
   {"word", cons, 2},
@@ -3454,6 +3456,14 @@ s_text (int ignore ATTRIBUTE_UNUSED)
   demand_empty_rest_of_line ();
 }
 
+/* Handle the .warn and .nowarn pseudo-ops.  */
+
+void
+s_warn (int set)
+{
+    flag_no_warnings = !set;
+}
+
 /* .weakref x, y sets x as an alias to y that, as long as y is not
    referenced directly, will cause y to become a weak symbol.  */
 void
diff -urp sources/binutils-2.22/gas/read.h binutils-2.22/gas/read.h
--- sources/binutils-2.22/gas/read.h	2009-09-29 16:17:07.000000000 +0200
+++ binutils-2.22/gas/read.h	2012-03-23 16:54:44.000000000 +0100
@@ -188,4 +188,5 @@ extern void s_xstab (int what);
 extern void s_rva (int);
 extern void s_incbin (int);
 extern int s_vendor_attribute (int);
+extern void s_warn (int);
 extern void s_weakref (int);