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[2620:137:e000::1:20]) by mx.google.com with ESMTP id j20-20020a1709066dd400b0077eca9fa444si2785303ejt.187.2022.10.14.13.22.37; Fri, 14 Oct 2022 13:23:04 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20210112 header.b=mo9CmUUM; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230371AbiJNUOL (ORCPT + 99 others); Fri, 14 Oct 2022 16:14:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59054 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229962AbiJNUOJ (ORCPT ); Fri, 14 Oct 2022 16:14:09 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00261B871 for ; Fri, 14 Oct 2022 13:14:06 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id b14-20020a056902030e00b006a827d81fd8so5196641ybs.17 for ; Fri, 14 Oct 2022 13:14:06 -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=LX7L7MHcXq5jVbKqaqLfnqus5haNEKNeBPEpGCMdeL1svg0RjOC5a9qU/clLUSW6gj /NQOXKxouVmxUgjnPisAXLtL+GDcsk2zHHPh2DHa29PbcpLFY+goFzM6Y1bqaDnzsaUM FGecR5vQU6DoVPpDvo07zN77u5jJZz+c7pAl9rSrTq5NrwhTK0xhhy9itiNrVulDV2u7 VftYkjt9+D3ppdoDDAjaTeVD2/v1/Yb5zd1YaJfYnYJA61SzC3gu8wl2xBF8EDDUjqBH IjeJy/AGeyu4yN8Zkwniu6fFqp3+5uhP4X9HaWac0U+taPRrftiTdF8TnjoJblPBpqNf 9z2Q== X-Gm-Message-State: ACrzQf0VSd6qFxwElqpuJznZRNEQyFZ66s/nZSaiGKbFPIBk/Sv3kBZ9 bGXibpwnmZJ5CZITiYg87Q9kZsqtAG9YfA7/R4s= 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 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-Spam-Status: No, score=-9.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746695864819077483?= X-GMAIL-MSGID: =?utf-8?q?1746695864819077483?= 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(-)