From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932213AbcI1JHq (ORCPT ); Wed, 28 Sep 2016 05:07:46 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:57302 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752843AbcI1JHN (ORCPT ); Wed, 28 Sep 2016 05:07:13 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann , Peter Oberparleiter , Michal Marek Subject: [PATCH 4.4 20/73] gcov: disable -Wmaybe-uninitialized warning Date: Wed, 28 Sep 2016 11:04:50 +0200 Message-Id: <20160928090435.978785138@linuxfoundation.org> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20160928090434.509091655@linuxfoundation.org> References: <20160928090434.509091655@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann commit e72e2dfe7c16ffbfbabf9cb24adc6d9f93a4fe37 upstream. When gcov profiling is enabled, we see a lot of spurious warnings about possibly uninitialized variables being used: arch/arm/mm/dma-mapping.c: In function 'arm_coherent_iommu_map_page': arch/arm/mm/dma-mapping.c:1085:16: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/clk/st/clk-flexgen.c: In function 'st_of_flexgen_setup': drivers/clk/st/clk-flexgen.c:323:9: warning: 'num_parents' may be used uninitialized in this function [-Wmaybe-uninitialized] kernel/cgroup.c: In function 'cgroup_mount': kernel/cgroup.c:2119:11: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized] All of these are false positives, so it seems better to just disable the warnings whenever GCOV is enabled. Most users don't enable GCOV, and based on a prior patch, it is now also disabled for 'allmodconfig' builds, so there should be no downsides of doing this. Signed-off-by: Arnd Bergmann Acked-by: Peter Oberparleiter Signed-off-by: Michal Marek Signed-off-by: Greg Kroah-Hartman --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/Makefile +++ b/Makefile @@ -368,7 +368,7 @@ AFLAGS_MODULE = LDFLAGS_MODULE = CFLAGS_KERNEL = AFLAGS_KERNEL = -CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im +CFLAGS_GCOV = -fprofile-arcs -ftest-coverage -fno-tree-loop-im -Wno-maybe-uninitialized # Use USERINCLUDE when you must reference the UAPI directories only.