From patchwork Sat Jun 24 18:40:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: WANG Xuerui X-Patchwork-Id: 13291756 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4501AEB64DD for ; Sat, 24 Jun 2023 18:42:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233244AbjFXSms (ORCPT ); Sat, 24 Jun 2023 14:42:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233233AbjFXSmr (ORCPT ); Sat, 24 Jun 2023 14:42:47 -0400 Received: from mailbox.box.xen0n.name (mail.xen0n.name [115.28.160.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6FB4C273D; Sat, 24 Jun 2023 11:42:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xen0n.name; s=mail; t=1687632119; bh=eN0XWTl7RfDHYLHR5QCiltkIlDC96O/391olzbyd6qc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=da6JduTUoxoszKkVxVXY+j4YYyoyjONHX5J/Laxd8qNa2RFLtGZEfC2GT6w0QlICf yZVG8PK1uBbfu0MXyy2qAWhfL8HAlg/K17Dsz7WE8FdYI7mnZ6UgW3jOra5B39mO5v bX7c6IleGWinbf3KjQmZqLbdJxYs4UCpZRIgo4dY= Received: from ld50.lan (unknown [101.88.25.181]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id EC3256015C; Sun, 25 Jun 2023 02:41:58 +0800 (CST) From: WANG Xuerui To: Huacai Chen Cc: WANG Rui , Xi Ruoyao , loongarch@lists.linux.dev, linux-kbuild@vger.kernel.org, llvm@lists.linux.dev, linux-kernel@vger.kernel.org, WANG Xuerui Subject: [PATCH v2 6/9] LoongArch: Remove all -G0 switches from CFLAGS Date: Sun, 25 Jun 2023 02:40:52 +0800 Message-Id: <20230624184055.3000636-7-kernel@xen0n.name> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230624184055.3000636-1-kernel@xen0n.name> References: <20230624184055.3000636-1-kernel@xen0n.name> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org From: WANG Xuerui In GCC, -G stands for "small data threshold", that instructs the compiler to put data smaller than the specified threshold in a dedicated "small data" section (called .sdata on LoongArch and several other arches). However, benefiting from this would require ABI cooperation, which is not the case for LoongArch; and current GCC behave the same whether -G0 (equal to disabling this optimization) is given or not. So, remove -G0 from CFLAGS altogether for one less thing to care about. This also benefits LLVM/Clang compatibility where the -G switch is not supported. Signed-off-by: WANG Xuerui --- arch/loongarch/Makefile | 4 ++-- arch/loongarch/vdso/Makefile | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index a27e264bdaa5..366771016b99 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -46,8 +46,8 @@ ld-emul = $(64bit-emul) cflags-y += -mabi=lp64s endif -cflags-y += -G0 -pipe -msoft-float -LDFLAGS_vmlinux += -G0 -static -n -nostdlib +cflags-y += -pipe -msoft-float +LDFLAGS_vmlinux += -static -n -nostdlib # When the assembler supports explicit relocation hint, we must use it. # GCC may have -mexplicit-relocs off by default if it was built with an old diff --git a/arch/loongarch/vdso/Makefile b/arch/loongarch/vdso/Makefile index 4c859a0e4754..ee4abcf5642e 100644 --- a/arch/loongarch/vdso/Makefile +++ b/arch/loongarch/vdso/Makefile @@ -25,7 +25,7 @@ endif cflags-vdso := $(ccflags-vdso) \ -isystem $(shell $(CC) -print-file-name=include) \ $(filter -W%,$(filter-out -Wa$(comma)%,$(KBUILD_CFLAGS))) \ - -O2 -g -fno-strict-aliasing -fno-common -fno-builtin -G0 \ + -O2 -g -fno-strict-aliasing -fno-common -fno-builtin \ -fno-stack-protector -fno-jump-tables -DDISABLE_BRANCH_PROFILING \ $(call cc-option, -fno-asynchronous-unwind-tables) \ $(call cc-option, -fno-stack-protector)