From nobody Sat Feb 7 17:20:16 2026 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 044B9EB64DD for ; Tue, 25 Jul 2023 05:39:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229454AbjGYFi7 (ORCPT ); Tue, 25 Jul 2023 01:38:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49102 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230433AbjGYFi4 (ORCPT ); Tue, 25 Jul 2023 01:38:56 -0400 Received: from mail-ej1-x62c.google.com (mail-ej1-x62c.google.com [IPv6:2a00:1450:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD0A419AA for ; Mon, 24 Jul 2023 22:38:52 -0700 (PDT) Received: by mail-ej1-x62c.google.com with SMTP id a640c23a62f3a-99313a34b2dso748918466b.1 for ; Mon, 24 Jul 2023 22:38:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1690263531; x=1690868331; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Y7e91BMfpSrUV8pLZU1LBjqTvh3MYJ90peEUrbZ0fJg=; b=DUV24tjMeuaYTRh7/en2rwqUQ0+Z84MXh9/5CuvvoPYwgfUUGT5C92XvGlgjodir7I DdKAbGyDJNcNNPqr9M7EbSkoyGIxObjYdArkaS2KSPwsqM785K3rSeWH2Alvn9h05Qm9 WlBBkAH92Hur813wc/6oNLVSXUAGe/mMeRVieqSfSJ19PnFyaGu4YVDevZh7L7fxonT2 sqSu8jL3ZSNzRMIRmxTM8RV+tfF1B6W9NiMcG4tUSGvcUPqp+FGO0KmsC/NsSNLS+KOa JihUGIjt1i2UhE0zex4wEfQ1u1Q/lNxR7zu8ks9wdLNGSKmkgYYsckHHA7jJZfEk7TKd U3qw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690263531; x=1690868331; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Y7e91BMfpSrUV8pLZU1LBjqTvh3MYJ90peEUrbZ0fJg=; b=HC7rumDlvDd1LVmNR6TS8UAbpKmQr6WQXEB/buv5VbKhYolX2B8ihp4bBWcicMxoLD Z6HjLqSVEGk7b6ua0C04oejddMetYlojRd9yHR5suUKMRREKVChEyIQ/i3zie0cXXLdn cC5Jn88OOvS0jbj9WyBdnpYad9uLQ7hT1pTSJxhb20sDFL9S6cnPMKLBMwVFehaDJn+h 9Db0xOc7kmfJtOWvx2z+XpJqaNJO7QrII2fNMSu5LApQgXpSB7Id7AsVd6P2GkGhiT3c I+X0y3PHmG7TVOpKK5A7QR/aduiolhxEewSVVjOw6FCcNCRFDTMXiezFhpCMpY2zbruy MqrQ== X-Gm-Message-State: ABy/qLYSusj8PhtYOqQvOchpt4KnRF2QxIr2aH43C7MGrw/H9mkvCV+G ywgwq6RMfGUA8P/2VI3ihaqiwf2W9Urmig== X-Google-Smtp-Source: APBJJlGIpBQohsfNWMduzGbsUTuAkIXnC9gXiYrUHa9hdT4wan2u4ldYKt0z7d2XhO4EFumjgXnwxA== X-Received: by 2002:a17:907:a070:b0:993:da91:6e0c with SMTP id ia16-20020a170907a07000b00993da916e0cmr11226554ejc.3.1690263531214; Mon, 24 Jul 2023 22:38:51 -0700 (PDT) Received: from nam-dell (ip-217-105-46-58.ip.prioritytelecom.net. [217.105.46.58]) by smtp.gmail.com with ESMTPSA id jp7-20020a170906f74700b009937dbabbd5sm7639369ejb.220.2023.07.24.22.38.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Jul 2023 22:38:50 -0700 (PDT) From: Nam Cao To: Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Nam Cao Subject: [PATCH] riscv: remove redundant mv instructions Date: Tue, 25 Jul 2023 07:38:35 +0200 Message-Id: <20230725053835.138910-1-namcaov@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Some mv instructions were useful when first introduced to preserve a0 and a1 before function calls. However the code has changed and they are now redundant. Remove them. Signed-off-by: Nam Cao Reviewed-by: Alexandre Ghiti --- arch/riscv/kernel/head.S | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 11c3b94c4534..3710ea5d160f 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -289,10 +289,6 @@ clear_bss: blt a3, a4, clear_bss clear_bss_done: #endif - /* Save hart ID and DTB physical address */ - mv s0, a0 - mv s1, a1 - la a2, boot_cpu_hartid XIP_FIXUP_OFFSET a2 REG_S a0, (a2) @@ -306,7 +302,7 @@ clear_bss_done: la a0, __dtb_start XIP_FIXUP_OFFSET a0 #else - mv a0, s1 + mv a0, a1 #endif /* CONFIG_BUILTIN_DTB */ call setup_vm #ifdef CONFIG_MMU --=20 2.34.1