From patchwork Fri Sep 18 19:49:37 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 48629 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n8IJu2Er005547 for ; Fri, 18 Sep 2009 19:56:02 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750771AbZIRTz6 (ORCPT ); Fri, 18 Sep 2009 15:55:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753343AbZIRTz6 (ORCPT ); Fri, 18 Sep 2009 15:55:58 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:52676 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750771AbZIRTz5 (ORCPT ); Fri, 18 Sep 2009 15:55:57 -0400 Received: from imap1.linux-foundation.org (imap1.linux-foundation.org [140.211.169.55]) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id n8IJpwws008458 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 18 Sep 2009 12:55:30 -0700 Received: from localhost.localdomain (localhost [127.0.0.1]) by imap1.linux-foundation.org (8.13.5.20060308/8.13.5/Debian-3ubuntu1.1) with ESMTP id n8IJnbGT019416; Fri, 18 Sep 2009 12:49:38 -0700 Message-Id: <200909181949.n8IJnbGT019416@imap1.linux-foundation.org> Subject: [patch 18/18] kbuild: set -fconserve-stack option for gcc 4.5 To: sam@ravnborg.org Cc: linux-kbuild@vger.kernel.org, akpm@linux-foundation.org, andi@firstfloor.org, ak@linux.intel.com From: akpm@linux-foundation.org Date: Fri, 18 Sep 2009 12:49:37 -0700 MIME-Version: 1.0 X-Spam-Status: No, hits=-3.513 required=5 tests=AWL, BAYES_00, OSDL_HEADER_SUBJECT_BRACKETED X-Spam-Checker-Version: SpamAssassin 3.2.4-osdl_revision__1.47__ X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.13 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org From: Andi Kleen The upcomming gcc 4.5 has a new -fconserve-stack option that tells the inliner to take stack frame size in account. Set it if the compiler supports it. Signed-off-by: Andi Kleen Cc: Sam Ravnborg Signed-off-by: Andrew Morton --- Makefile | 3 +++ 1 file changed, 3 insertions(+) diff -puN Makefile~kbuild-set-fconserve-stack-option-for-gcc-45 Makefile --- a/Makefile~kbuild-set-fconserve-stack-option-for-gcc-45 +++ a/Makefile @@ -573,6 +573,9 @@ KBUILD_CFLAGS += $(call cc-option,-fno-s # revert to pre-gcc-4.4 behaviour of .eh_frame KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) +# conserve stack if available +KBUILD_CFLAGS += $(call cc-option,-fconserve-stack) + # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments # But warn user when we do so warn-assign = \