From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 56CFA440C for ; Fri, 14 Oct 2022 20:14:07 +0000 (UTC) Received: by mail-yb1-f202.google.com with SMTP id y6-20020a25b9c6000000b006c1c6161716so5200236ybj.8 for ; Fri, 14 Oct 2022 13:14:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=s3obta7+4jpsxJjGufR8RmHp+D4xEEYHKC+46IVfYMg=; b=mo9CmUUMdRpfCf1BqHvLOZiOPSkOBTRiws9esonvY6HL8h7ba+rKQG2UZQCYwLrxMu wK4Qpi6Y5gA2JDxIZ4B4Qm9EtAviDDngaRT/GqIpz+1Uied19OsHI4504VP5ATSm4MKI UF8/McecB6Lfa+hyrQ+vJJ1CfjddtfxojbDFTS9F38jtgImsDIxcJHYlcAGmoOhZfEUP QYo8mOph/McaR45tulTZyk8YeLAoZwc6UMiDz7Y3CqVTyhskSjmUhTVDU1d7ZlhnEWyQ wwd99n1EgQvSlfah1WL/Q3rXRbxZ4cgnk56WvOQnyQEhzg4MShv+iG6IdvddCZ0XgT/b tX/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=s3obta7+4jpsxJjGufR8RmHp+D4xEEYHKC+46IVfYMg=; b=h1hAXlTMK6rziBw1vnUpzKtDtT9rcQcqETDQ10W+cIjC+cpJVXNBF8AenRKpOMvKbl 0qClPgtx5x9jCOM63Rny/z5XhsPejJkkeDpB6zOGGWZtaKVje1BKgm41gWtDtvn8IgUp 10xFm6t/j+FFF65xd3A+BeSbQIRLNJumgFFIbOIr6sD5/IIgC3HMS2cQFz74EZahthkb KW+2ADYTehlhrVCs0PDewz9I2h3P4Pl0WuLMhTZssOO1SL1Q9GKuH0c/8X8BMHdtDe7c T9E35HJU19snCs7KjpQAmuej6EdGQK1K4NCbQrKKd9Dc9Xwe1K4eoiN739fZrJFKYLWE 1FeQ== X-Gm-Message-State: ACrzQf0Mr4Lsk9sbHypJTsOWC+ZEraQ8M8ZNiNbQtJEgJRPLEl8XIZvh ua+VLX1OKwIUk+s2eHDeuK6pDBdHb9FVY5BfhHQ= X-Google-Smtp-Source: AMsMyM7Sxa9uXolZSaNYf6qnyKcfhLQsqFTuuKh9YootYfPXSve/V/uD1ICzJRJvCo7/V9ExOV5N2S/1SHsM4STSfMg= X-Received: from ndesaulniers-desktop.svl.corp.google.com ([2620:0:100e:712:2ba5:63af:4077:4515]) (user=ndesaulniers job=sendgmr) by 2002:a0d:ea97:0:b0:354:d656:7e40 with SMTP id t145-20020a0dea97000000b00354d6567e40mr6017256ywe.421.1665778446291; Fri, 14 Oct 2022 13:14:06 -0700 (PDT) Date: Fri, 14 Oct 2022 13:13:50 -0700 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=UIrHvErwpgNbhCkRZAYSX0CFd/XFEwqX3D0xqtqjNug= X-Developer-Signature: v=1; a=ed25519-sha256; t=1665778433; l=3162; i=ndesaulniers@google.com; s=20220923; h=from:subject; bh=6WE50nrg4uUCeHIllAF+DlEWwXV19s8fgb2dD/cMHyI=; b=X+EmZHmGxUWmuu1FBspMvMc8/hsqTc1LFxbFjYnBl4K/Pm+LC0YjN/wpU3EKSbO+qqKM09KVrLf9 WOLqxe7LBj4YAj8RIUOWNUH6s9FV/XLS9lqBzPH8q38NJnfgaAPE X-Mailer: git-send-email 2.38.0.413.g74048e4d9e-goog Message-ID: <20221014201354.3190007-1-ndesaulniers@google.com> Subject: [PATCH v4 0/4] pass -march= only to compiler From: Nick Desaulniers To: Russell King Cc: Arnd Bergmann , Ard Biesheuvel , Masahiro Yamada , Linus Walleij , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor , Nick Desaulniers Content-Type: text/plain; charset="UTF-8" When both -march= and -Wa,-march= are specified for assembler or assembler-with-cpp sources, GCC and Clang will prefer the -Wa,-march= value but Clang will warn that -march= is unused. warning: argument unused during compilation: '-march=armv6k' [-Wunused-command-line-argument] This is the top group of warnings we observe when using clang to assemble the kernel via `ARCH=arm make LLVM=1`. Arnd sent a v2 of my previous patch https://lore.kernel.org/linux-arm-kernel/20210928154143.2106903-14-arnd@kernel.org/ I added yet a few more instances I found since then. Nathan pointed out a new one too that I've fixed since v3. Fixing this will allow us to enable -Werror=unused-command-line-argument for clang builds. v3 had an issue wrt. __thumb2__ https://lore.kernel.org/llvm/CAKwvOdmkd2PxvMUZA=A-72eATGDZkqDj--Bv1W+Xt_K_LWdROA@mail.gmail.com/ I've incorporated idea from Nathan and Ard on that. Nick Desaulniers (4): ARM: remove lazy evaluation in Makefile ARM: use .arch directives instead of assembler command line flags ARM: only use -mtp=cp15 for the compiler ARM: pass -march= only to compiler arch/arm/Makefile | 78 ++++++++++++++++------------- arch/arm/boot/compressed/Makefile | 1 - arch/arm/common/Makefile | 2 - arch/arm/common/mcpm_head.S | 2 + arch/arm/common/vlock.S | 2 + arch/arm/kernel/Makefile | 2 - arch/arm/kernel/hyp-stub.S | 2 + arch/arm/kernel/swp_emulate.c | 1 + arch/arm/lib/Makefile | 4 -- arch/arm/lib/delay-loop.S | 4 ++ arch/arm/mach-at91/Makefile | 3 -- arch/arm/mach-at91/pm_suspend.S | 4 ++ arch/arm/mach-imx/Makefile | 3 -- arch/arm/mach-imx/headsmp.S | 2 + arch/arm/mach-imx/resume-imx6.S | 2 + arch/arm/mach-imx/suspend-imx6.S | 2 + arch/arm/mach-mvebu/Makefile | 3 -- arch/arm/mach-mvebu/coherency_ll.S | 1 + arch/arm/mach-mvebu/pmsu.c | 1 + arch/arm/mach-npcm/Makefile | 2 - arch/arm/mach-npcm/headsmp.S | 2 + arch/arm/mach-tegra/Makefile | 2 - arch/arm/mach-tegra/reset-handler.S | 2 + arch/arm/mach-tegra/sleep-tegra20.S | 2 + arch/arm/mach-tegra/sleep-tegra30.S | 2 + arch/arm/mach-tegra/sleep.S | 2 + arch/arm/mm/Makefile | 15 ------ arch/arm/mm/abort-ev6.S | 1 + arch/arm/mm/abort-ev7.S | 1 + arch/arm/mm/cache-v6.S | 2 + arch/arm/mm/cache-v7.S | 2 + arch/arm/mm/cache-v7m.S | 2 + arch/arm/mm/copypage-feroceon.c | 1 + arch/arm/mm/proc-v6.S | 2 + arch/arm/mm/proc-v7-2level.S | 2 + arch/arm/mm/proc-v7.S | 2 + arch/arm/mm/tlb-v6.S | 2 + arch/arm/mm/tlb-v7.S | 2 + drivers/memory/Makefile | 2 - drivers/memory/ti-emif-sram-pm.S | 1 + drivers/soc/bcm/brcmstb/pm/Makefile | 1 - drivers/soc/bcm/brcmstb/pm/s2-arm.S | 1 + 42 files changed, 97 insertions(+), 75 deletions(-) -- 2.38.0.413.g74048e4d9e-goog From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 80B4CC4332F for ; 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Fri, 14 Oct 2022 13:14:06 -0700 (PDT) Date: Fri, 14 Oct 2022 13:13:50 -0700 Mime-Version: 1.0 X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=UIrHvErwpgNbhCkRZAYSX0CFd/XFEwqX3D0xqtqjNug= X-Developer-Signature: v=1; a=ed25519-sha256; t=1665778433; l=3162; i=ndesaulniers@google.com; s=20220923; h=from:subject; bh=6WE50nrg4uUCeHIllAF+DlEWwXV19s8fgb2dD/cMHyI=; b=X+EmZHmGxUWmuu1FBspMvMc8/hsqTc1LFxbFjYnBl4K/Pm+LC0YjN/wpU3EKSbO+qqKM09KVrLf9 WOLqxe7LBj4YAj8RIUOWNUH6s9FV/XLS9lqBzPH8q38NJnfgaAPE X-Mailer: git-send-email 2.38.0.413.g74048e4d9e-goog Message-ID: <20221014201354.3190007-1-ndesaulniers@google.com> Subject: [PATCH v4 0/4] pass -march= only to compiler From: Nick Desaulniers To: Russell King Cc: Arnd Bergmann , Ard Biesheuvel , Masahiro Yamada , Linus Walleij , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nathan Chancellor , Nick Desaulniers X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221014_131409_469853_0C9C1E12 X-CRM114-Status: GOOD ( 11.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org When both -march= and -Wa,-march= are specified for assembler or assembler-with-cpp sources, GCC and Clang will prefer the -Wa,-march= value but Clang will warn that -march= is unused. warning: argument unused during compilation: '-march=armv6k' [-Wunused-command-line-argument] This is the top group of warnings we observe when using clang to assemble the kernel via `ARCH=arm make LLVM=1`. Arnd sent a v2 of my previous patch https://lore.kernel.org/linux-arm-kernel/20210928154143.2106903-14-arnd@kernel.org/ I added yet a few more instances I found since then. Nathan pointed out a new one too that I've fixed since v3. Fixing this will allow us to enable -Werror=unused-command-line-argument for clang builds. v3 had an issue wrt. __thumb2__ https://lore.kernel.org/llvm/CAKwvOdmkd2PxvMUZA=A-72eATGDZkqDj--Bv1W+Xt_K_LWdROA@mail.gmail.com/ I've incorporated idea from Nathan and Ard on that. Nick Desaulniers (4): ARM: remove lazy evaluation in Makefile ARM: use .arch directives instead of assembler command line flags ARM: only use -mtp=cp15 for the compiler ARM: pass -march= only to compiler arch/arm/Makefile | 78 ++++++++++++++++------------- arch/arm/boot/compressed/Makefile | 1 - arch/arm/common/Makefile | 2 - arch/arm/common/mcpm_head.S | 2 + arch/arm/common/vlock.S | 2 + arch/arm/kernel/Makefile | 2 - arch/arm/kernel/hyp-stub.S | 2 + arch/arm/kernel/swp_emulate.c | 1 + arch/arm/lib/Makefile | 4 -- arch/arm/lib/delay-loop.S | 4 ++ arch/arm/mach-at91/Makefile | 3 -- arch/arm/mach-at91/pm_suspend.S | 4 ++ arch/arm/mach-imx/Makefile | 3 -- arch/arm/mach-imx/headsmp.S | 2 + arch/arm/mach-imx/resume-imx6.S | 2 + arch/arm/mach-imx/suspend-imx6.S | 2 + arch/arm/mach-mvebu/Makefile | 3 -- arch/arm/mach-mvebu/coherency_ll.S | 1 + arch/arm/mach-mvebu/pmsu.c | 1 + arch/arm/mach-npcm/Makefile | 2 - arch/arm/mach-npcm/headsmp.S | 2 + arch/arm/mach-tegra/Makefile | 2 - arch/arm/mach-tegra/reset-handler.S | 2 + arch/arm/mach-tegra/sleep-tegra20.S | 2 + arch/arm/mach-tegra/sleep-tegra30.S | 2 + arch/arm/mach-tegra/sleep.S | 2 + arch/arm/mm/Makefile | 15 ------ arch/arm/mm/abort-ev6.S | 1 + arch/arm/mm/abort-ev7.S | 1 + arch/arm/mm/cache-v6.S | 2 + arch/arm/mm/cache-v7.S | 2 + arch/arm/mm/cache-v7m.S | 2 + arch/arm/mm/copypage-feroceon.c | 1 + arch/arm/mm/proc-v6.S | 2 + arch/arm/mm/proc-v7-2level.S | 2 + arch/arm/mm/proc-v7.S | 2 + arch/arm/mm/tlb-v6.S | 2 + arch/arm/mm/tlb-v7.S | 2 + drivers/memory/Makefile | 2 - drivers/memory/ti-emif-sram-pm.S | 1 + drivers/soc/bcm/brcmstb/pm/Makefile | 1 - drivers/soc/bcm/brcmstb/pm/s2-arm.S | 1 + 42 files changed, 97 insertions(+), 75 deletions(-) -- 2.38.0.413.g74048e4d9e-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel