From owner-svn-src-all@FreeBSD.ORG Wed Dec 21 15:59:19 2011 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 29001106566B; Wed, 21 Dec 2011 15:59:19 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id F256E8FC0C; Wed, 21 Dec 2011 15:59:18 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id pBLFxInq075817; Wed, 21 Dec 2011 15:59:18 GMT (envelope-from dim@svn.freebsd.org) Received: (from dim@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id pBLFxICX075814; Wed, 21 Dec 2011 15:59:18 GMT (envelope-from dim@svn.freebsd.org) Message-Id: <201112211559.pBLFxICX075814@svn.freebsd.org> From: Dimitry Andric Date: Wed, 21 Dec 2011 15:59:18 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r228779 - head/sys/conf X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Dec 2011 15:59:19 -0000 Author: dim Date: Wed Dec 21 15:59:18 2011 New Revision: 228779 URL: http://svn.freebsd.org/changeset/base/228779 Log: Start selectively disabling a few kernel build warnings for clang, since there are some places in the kernel where fixing them is too disruptive, or where there is a false positive. In this case, disable -Wconstant-conversion for two aic7xxx-related files, as they get the following warning on i386 (and possibly on other 32-bit arches): sys/dev/aic7xxx/ahc_pci.c:112:10: warning: implicit conversion from 'long long' to 'bus_addr_t' (aka 'unsigned int') changes value from 549755813887 to 4294967295 [-Wconstant-conversion] ? 0x7FFFFFFFFFLL ~~^~~~~~~~~~~~~~ This is a false positive, since the code only passes the 0x7FFFFFFFFFLL argument, if sizeof(bus_addr_t) is larger than 4 (e.g. on 64 bit arches, or when PAE is enabled on i386). The code could be refactored to do compile-time checks, but that is more disruptive. MFC after: 1 week Modified: head/sys/conf/files head/sys/conf/kern.mk Modified: head/sys/conf/files ============================================================================== --- head/sys/conf/files Wed Dec 21 15:40:26 2011 (r228778) +++ head/sys/conf/files Wed Dec 21 15:59:18 2011 (r228779) @@ -508,8 +508,10 @@ dev/aic/aic.c optional aic dev/aic/aic_pccard.c optional aic pccard dev/aic7xxx/ahc_eisa.c optional ahc eisa dev/aic7xxx/ahc_isa.c optional ahc isa -dev/aic7xxx/ahc_pci.c optional ahc pci -dev/aic7xxx/ahd_pci.c optional ahd pci +dev/aic7xxx/ahc_pci.c optional ahc pci \ + compile-with "${NORMAL_C} ${NO_WCONSTANT_CONVERSION}" +dev/aic7xxx/ahd_pci.c optional ahd pci \ + compile-with "${NORMAL_C} ${NO_WCONSTANT_CONVERSION}" dev/aic7xxx/aic7770.c optional ahc dev/aic7xxx/aic79xx.c optional ahd pci dev/aic7xxx/aic79xx_osm.c optional ahd pci Modified: head/sys/conf/kern.mk ============================================================================== --- head/sys/conf/kern.mk Wed Dec 21 15:40:26 2011 (r228778) +++ head/sys/conf/kern.mk Wed Dec 21 15:59:18 2011 (r228779) @@ -11,6 +11,13 @@ CWARNFLAGS?= -Wall -Wredundant-decls -Wn # The following flags are next up for working on: # -Wextra +# Disable a few warnings for clang, since there are several places in the +# kernel where fixing them is more trouble than it is worth, or where there is +# a false positive. +.if ${CC:T:Mclang} == "clang" +NO_WCONSTANT_CONVERSION= -Wno-constant-conversion +.endif + # # On i386, do not align the stack to 16-byte boundaries. Otherwise GCC 2.95 # and above adds code to the entry and exit point of every function to align the