From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756460AbdKCRQN (ORCPT ); Fri, 3 Nov 2017 13:16:13 -0400 Received: from mail-io0-f193.google.com ([209.85.223.193]:48363 "EHLO mail-io0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933353AbdKCRMu (ORCPT ); Fri, 3 Nov 2017 13:12:50 -0400 X-Google-Smtp-Source: ABhQp+SkjnSmgCVWIKhy77NEtiKB8yM03zindtwkZ9UDA2lmdXQqU0Ryw/ckZp0F+D40dHGBbsZZeA== From: Sami Tolvanen To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Greg Hackmann , Kees Cook , Matthias Kaehlcke , Nick Desaulniers , Sami Tolvanen Subject: [PATCH 07/15] arm64: use -mno-implicit-float instead of -mgeneral-regs-only Date: Fri, 3 Nov 2017 10:11:52 -0700 Message-Id: <20171103171203.107569-9-samitolvanen@google.com> X-Mailer: git-send-email 2.15.0.403.gc27cc4dac6-goog In-Reply-To: <20171103171203.107569-1-samitolvanen@google.com> References: <20171103171203.107569-1-samitolvanen@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Hackmann LLVM bug 30792 causes clang's AArch64 backend to crash compiling arch/arm64/crypto/aes-ce-cipher.c. Replacing -mgeneral-regs-only with -mno-implicit-float is the suggested workaround. Signed-off-by: Greg Hackmann Cc: Matthias Kaehlcke Signed-off-by: Sami Tolvanen --- arch/arm64/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 939b310913cf..eb6f3c9ec6cb 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -45,7 +45,13 @@ $(warning Detected assembler with broken .inst; disassembly will be unreliable) endif endif -KBUILD_CFLAGS += -mgeneral-regs-only $(lseinstr) $(brokengasinst) +ifeq ($(cc-name),clang) +# This is a workaround for https://bugs.llvm.org/show_bug.cgi?id=30792. +KBUILD_CFLAGS += -mno-implicit-float +else +KBUILD_CFLAGS += -mgeneral-regs-only +endif +KBUILD_CFLAGS += $(lseinstr) $(brokengasinst) KBUILD_CFLAGS += -fno-asynchronous-unwind-tables KBUILD_CFLAGS += $(call cc-option, -mpc-relative-literal-loads) KBUILD_AFLAGS += $(lseinstr) $(brokengasinst) -- 2.15.0.403.gc27cc4dac6-goog