From patchwork Sun Aug 19 02:57:09 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andi Kleen X-Patchwork-Id: 1343751 Return-Path: X-Original-To: patchwork-linux-kbuild@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id C9C33DF25A for ; Sun, 19 Aug 2012 03:14:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754677Ab2HSC6v (ORCPT ); Sat, 18 Aug 2012 22:58:51 -0400 Received: from mga14.intel.com ([143.182.124.37]:42537 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753390Ab2HSC5g (ORCPT ); Sat, 18 Aug 2012 22:57:36 -0400 Received: from azsmga002.ch.intel.com ([10.2.17.35]) by azsmga102.ch.intel.com with ESMTP; 18 Aug 2012 19:57:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.77,792,1336374000"; d="scan'208";a="135817673" Received: from tassilo.jf.intel.com ([10.7.201.151]) by AZSMGA002.ch.intel.com with ESMTP; 18 Aug 2012 19:57:26 -0700 Received: by tassilo.jf.intel.com (Postfix, from userid 501) id 59AA624195C; Sat, 18 Aug 2012 19:57:26 -0700 (PDT) From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, mmarek@suse.cz, linux-kbuild@vger.kernel.org, JBeulich@suse.com, akpm@linux-foundation.org, Andi Kleen , rusty@rustcorp.com.au Subject: [PATCH 73/74] lto, module: Warn about modules that are not fully LTOed Date: Sat, 18 Aug 2012 19:57:09 -0700 Message-Id: <1345345030-22211-74-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1345345030-22211-1-git-send-email-andi@firstfloor.org> References: <1345345030-22211-1-git-send-email-andi@firstfloor.org> Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org From: Andi Kleen When __gnu_lto_* is present that means that the module hasn't run with LTO yet. Cc: rusty@rustcorp.com.au Signed-off-by: Andi Kleen --- kernel/module.c | 5 ++++- 1 files changed, 4 insertions(+), 1 deletions(-) diff --git a/kernel/module.c b/kernel/module.c index 2cbbae3..a8a29c4 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1905,8 +1905,11 @@ static int simplify_symbols(struct module *mod, const struct load_info *info) switch (sym[i].st_shndx) { case SHN_COMMON: /* Ignore common symbols */ - if (!strncmp(name, "__gnu_lto", 9)) + if (!strncmp(name, "__gnu_lto", 9)) { + printk("%s: module not link time optimized\n", + mod->name); break; + } /* We compiled with -fno-common. These are not supposed to happen. */