Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754277AbeAKJQd (ORCPT + 1 other); Thu, 11 Jan 2018 04:16:33 -0500 Received: from szxga05-in.huawei.com ([45.249.212.191]:3772 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753909AbeAKJQb (ORCPT ); Thu, 11 Jan 2018 04:16:31 -0500 From: Xiongfeng Wang To: , CC: , , , Subject: [PATCH] Kbuild: suppress packed-not-aligned warning for default setting only Date: Thu, 11 Jan 2018 17:22:29 +0800 Message-ID: <1515662549-58933-1-git-send-email-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 1.8.3.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: From: Xiongfeng Wang gcc-8 reports many -Wpacked-not-aligned warnings. The below are some examples. ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); ./include/linux/ceph/msgr.h:67:1: warning: alignment 1 of 'struct ceph_entity_addr' is less than 8 [-Wpacked-not-aligned] } __attribute__ ((packed)); This patch suppress this kind of warnings for default setting. Signed-off-by: Xiongfeng Wang --- scripts/Makefile.extrawarn | 3 +++ 1 file changed, 3 insertions(+) diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index c6ebf42..8d53570 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -11,6 +11,8 @@ # are not supported by all versions of the compiler # ========================================================================== +KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) + ifeq ("$(origin W)", "command line") export KBUILD_ENABLE_EXTRA_GCC_CHECKS := $(W) endif @@ -26,6 +28,7 @@ warning-1 += -Wold-style-definition warning-1 += $(call cc-option, -Wmissing-include-dirs) warning-1 += $(call cc-option, -Wunused-but-set-variable) warning-1 += $(call cc-option, -Wunused-const-variable) +warning-1 += $(call cc-option, -Wpacked-not-aligned) warning-1 += $(call cc-disable-warning, missing-field-initializers) warning-1 += $(call cc-disable-warning, sign-compare) -- 1.8.3.1