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[209.132.180.67]) by mx.google.com with ESMTP id r3-v6si25099247pgr.252.2018.10.30.20.28.43; Tue, 30 Oct 2018 20:28:43 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=ukcOrHEV; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729064AbeJaMYv (ORCPT + 32 others); Wed, 31 Oct 2018 08:24:51 -0400 Received: from mail-pl1-f196.google.com ([209.85.214.196]:35012 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725942AbeJaMYv (ORCPT ); Wed, 31 Oct 2018 08:24:51 -0400 Received: by mail-pl1-f196.google.com with SMTP id n4-v6so5989466plp.2 for ; Tue, 30 Oct 2018 20:28:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=hkiQMuZb68Bws7nm5qJb3wroH0iBRmJTrQHyerd/nO4=; b=ukcOrHEVCv2LEMCZE//ejDKs7a5piuP2u4nyoWJQcmu/xXveMEECC3WuhN8BSs1TYc 0dXKTKHhpRZ/c7YD13HmHtFbxebdOXABl5qWgPt5k3WIu3PrmEReQ0i7YIFU2a8HDHK8 HPhVzrFWmKSAyDoaxX9+1aAmIMcQFIC+rJ7niHGoQo+9HxuR7NpdiKfJE6JfcAAsbzYD 0dks3Pv6QSOVRrNGqo/BasXMTCDyOLWk9AzIYDGdP8Bt7YVqKwwVXCCJ7Q49QIgDQ9dx FCzimZViXPmStK/FVmxOGfChOF1coZ12IwaIi+wmWaQDUBHiekPieDv0Ho9sTyYpULwb 1OTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :mime-version:content-transfer-encoding; bh=hkiQMuZb68Bws7nm5qJb3wroH0iBRmJTrQHyerd/nO4=; b=tQeTV6etf4dneC/oBUv/aMwtAX5GnJcdr7x7bgH8LLLaYm6DfimJzTIZqRA0IvyVSD mE1w1X9FfmWCPvhghyRe1NL9UbmhKa0VvtpqnJ/DnhthI2RvffEcJv5S4nXjct+nBQz2 T1M6LdM7HfF+IO4eYxyZmV8oW5awghT3M80rCHR7KmJzS0Zh3TBJSfaTNhWU/KHFxVe2 XETs++19Alp9r0Hu7niC8De/OGkUSBrl6b1lmdQORqfxf9FSeSMRtDnTyHKWqi9kekv8 jf31lAkZtkTPo6bdw92kz1sGYnOVsg1wNFxLREfjZ9lMGfzYfeY6x0yjJgxhIwQTr6Il +qWg== X-Gm-Message-State: AGRZ1gJlXLa4X9i73wJnzF0VORxC4A7UElxJaL8DpcnsC8oaxlcrE2Go X02fyPEs9jQ3GAlwHdjsCPI= X-Received: by 2002:a17:902:6909:: with SMTP id j9-v6mr1439240plk.221.1540956520142; Tue, 30 Oct 2018 20:28:40 -0700 (PDT) Received: from aurora.jms.id.au ([45.124.203.15]) by smtp.gmail.com with ESMTPSA id b62-v6sm27195786pfa.159.2018.10.30.20.28.35 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 30 Oct 2018 20:28:38 -0700 (PDT) Received: by aurora.jms.id.au (sSMTP sendmail emulation); Wed, 31 Oct 2018 13:58:31 +1030 From: Joel Stanley To: Michael Ellerman , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: Arnd Bergmann , Kees Cook , Nick Desaulniers , Jinsong Ji Subject: [PATCH] raid6/ppc: Fix build for clang Date: Wed, 31 Oct 2018 13:58:29 +1030 Message-Id: <20181031032829.18131-1-joel@jms.id.au> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We cannot build these files with clang as it does not allow altivec instructions in assembly when -msoft-float is passed. Jinsong Ji wrote: > We currently disable Altivec/VSX support when enabling soft-float. So > any usage of vector builtins will break. > > Enable Altivec/VSX with soft-float may need quite some clean up work, so > I guess this is currently a limitation. > > Removing -msoft-float will make it work (and we are lucky that no > floating point instructions will be generated as well). This is a workaround until the issue is resolved in clang. Link: https://bugs.llvm.org/show_bug.cgi?id=31177 Link: https://github.com/ClangBuiltLinux/linux/issues/239 Signed-off-by: Joel Stanley --- lib/raid6/Makefile | 15 +++++++++++++++ 1 file changed, 15 insertions(+) -- 2.19.1 diff --git a/lib/raid6/Makefile b/lib/raid6/Makefile index 2f8b61dfd9b0..3a844e6fd01c 100644 --- a/lib/raid6/Makefile +++ b/lib/raid6/Makefile @@ -18,6 +18,21 @@ quiet_cmd_unroll = UNROLL $@ ifeq ($(CONFIG_ALTIVEC),y) altivec_flags := -maltivec $(call cc-option,-mabi=altivec) + +ifdef CONFIG_CC_IS_CLANG +# clang ppc port does not yet support -maltifec when -msoft-float is +# enabled. A future release of clang will resolve this +# https://bugs.llvm.org/show_bug.cgi?id=31177 +CFLAGS_REMOVE_altivec1.o += -msoft-float +CFLAGS_REMOVE_altivec2.o += -msoft-float +CFLAGS_REMOVE_altivec4.o += -msoft-float +CFLAGS_REMOVE_altivec8.o += -msoft-float +CFLAGS_REMOVE_altivec8.o += -msoft-float +CFLAGS_REMOVE_vpermxor1.o += -msoft-float +CFLAGS_REMOVE_vpermxor2.o += -msoft-float +CFLAGS_REMOVE_vpermxor4.o += -msoft-float +CFLAGS_REMOVE_vpermxor8.o += -msoft-float +endif endif # The GCC option -ffreestanding is required in order to compile code containing