From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753173AbaBNVW1 (ORCPT ); Fri, 14 Feb 2014 16:22:27 -0500 Received: from mga09.intel.com ([134.134.136.24]:6596 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752583AbaBNVWZ (ORCPT ); Fri, 14 Feb 2014 16:22:25 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.95,847,1384329600"; d="scan'208";a="475474898" From: Andi Kleen To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, linux-kbuild@vger.kernel.org, mmarek@suse.cz, Andi Kleen Subject: [PATCH 02/19] lto: Disable LTO for hweight functions Date: Fri, 14 Feb 2014 22:21:26 +0100 Message-Id: <1392412903-25733-3-git-send-email-andi@firstfloor.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1392412903-25733-1-git-send-email-andi@firstfloor.org> References: <1392412903-25733-1-git-send-email-andi@firstfloor.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andi Kleen x86 calls the hweight library functions with special calling conventions. LTO doesn't support compiling individual files with special options. Just disable LTO for the file. Signed-off-by: Andi Kleen --- lib/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/lib/Makefile b/lib/Makefile index 48140e3..2057304 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -46,7 +46,9 @@ obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o GCOV_PROFILE_hweight.o := n -CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS)) +CFLAGS_hweight.o = $(subst $(quote),,$(CONFIG_ARCH_HWEIGHT_CFLAGS)) \ + $(DISABLE_LTO) + obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o obj-$(CONFIG_BTREE) += btree.o -- 1.8.5.2