From nobody Wed Dec 17 05:47:42 2025 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 DB5DCC4332F for ; Tue, 12 Dec 2023 15:05:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376381AbjLLPFv (ORCPT ); Tue, 12 Dec 2023 10:05:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55074 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232716AbjLLPFt (ORCPT ); Tue, 12 Dec 2023 10:05:49 -0500 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53AE8DB for ; Tue, 12 Dec 2023 07:05:55 -0800 (PST) Received: by mail-pj1-x1032.google.com with SMTP id 98e67ed59e1d1-2866fe08b32so3992231a91.2 for ; Tue, 12 Dec 2023 07:05:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1702393554; x=1702998354; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=3txP48XMkWU7VdifF1r+KohcEJ8EmE42oAUbDKnZrMo=; b=i2itJ4T5uborrMbjtJtD+rnhEgZm1WNVg6vpVm0c6VzlAU/sdxcW5kVX5yx+5x3Gp8 VffOaMu/lsak4A4KSjtFjwsNfTTzqv8kGRtYsOkj5sKo2uA7PjqNq/xM36fZSMjdK4rg GN5AjkzVIE+j5gElLUgpp2U+fNh6cHQeOiHdkAec4+X8oI/uLG0IybpQ257F3/lKKBan Bfxr8lFA0CXH+CVu/GI6b88ofCd9uJkA8XSVuHHwneRKAKZylacYxAE8/cOF5Ftc782d KZJnpsqQ8n/USs9C/Po20xNyPwCMRkommD2+FvEymqKmM57xUu/uq4O7Yb5mxKjO2xrt ZYbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702393554; x=1702998354; 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=3txP48XMkWU7VdifF1r+KohcEJ8EmE42oAUbDKnZrMo=; b=wIrSI7giNtsK5uttk5drRs7JiII/8DiW8dtPRXuaMCRcZbYS0rAGglywk+VeCjh8m4 zUOpAiZ7WxZLf45WLrGLKKa++0W6l4gDU+k4iDQ+HUSXzMGjaRiXa6V3nihkrWEh3QOi DonWkgkjgMai3jR1efLBAQOBRZqWJ23YPfoBfjGKFtg18I0/i9BwE6CsxjUHlLkKtERW TgNZR6MUxEDW6mNcx59mL+f4A45pjZli0L5+bhKwz4OcD6ZqA06kvHJzzxZsPUHAMDvq F1DqiNwrjXHp1SQsKemZsIbT/xhBtL/p/gL1EL5cC272cE1kOQK9ov2+hQErM5gaYfXD 63jA== X-Gm-Message-State: AOJu0Ywczf2hXt4g2gEmdnQat6zGfwOOEKsfs6zzEbNc+RLlaj4ufX7H KGaM0wzntJ0fFvfsltw2Do2ERLhpwcY= X-Google-Smtp-Source: AGHT+IHjKEVwynFnXlWyt+MOonfSE3qN4EzOLY/c2A9E5u3wQ8BJIgpVa9Tu0Coe6hXPSAjohfrC8g== X-Received: by 2002:a17:90a:c58d:b0:28a:b5e0:b569 with SMTP id l13-20020a17090ac58d00b0028ab5e0b569mr827977pjt.37.1702393554470; Tue, 12 Dec 2023 07:05:54 -0800 (PST) Received: from code.. ([144.202.108.46]) by smtp.gmail.com with ESMTPSA id pb17-20020a17090b3c1100b00286ed94466dsm9188599pjb.32.2023.12.12.07.05.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Dec 2023 07:05:54 -0800 (PST) From: Yuntao Wang To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Baoquan He , Bjorn Helgaas , Simon Horman , Andrew Morton , Yuntao Wang Subject: [PATCH] x86/kexec: Simplify the logic of mem_region_callback() Date: Tue, 12 Dec 2023 23:05:06 +0800 Message-ID: <20231212150506.31711-1-ytcoode@gmail.com> X-Mailer: git-send-email 2.43.0 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" The expression `mstart + resource_size(res) - 1` is actually equivalent to `res->end`, simplify the logic of this function to improve readability. Signed-off-by: Yuntao Wang Acked-by: Baoquan He --- arch/x86/kernel/machine_kexec_64.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_k= exec_64.c index 1a3e2c05a8a5..6f8df998890e 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -42,12 +42,9 @@ struct init_pgtable_data { static int mem_region_callback(struct resource *res, void *arg) { struct init_pgtable_data *data =3D arg; - unsigned long mstart, mend; - - mstart =3D res->start; - mend =3D mstart + resource_size(res) - 1; =20 - return kernel_ident_mapping_init(data->info, data->level4p, mstart, mend); + return kernel_ident_mapping_init(data->info, data->level4p, + res->start, res->end); } =20 static int --=20 2.43.0