From patchwork Tue May 14 20:40:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 1099703 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=devicetree-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=chromium.org header.i=@chromium.org header.b="aoywBB6x"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 453V2g0lMHz9sP8 for ; Wed, 15 May 2019 06:41:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726449AbfENUk7 (ORCPT ); Tue, 14 May 2019 16:40:59 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:42959 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726383AbfENUk5 (ORCPT ); Tue, 14 May 2019 16:40:57 -0400 Received: by mail-pf1-f193.google.com with SMTP id 13so100040pfw.9 for ; Tue, 14 May 2019 13:40:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ZOSFwWR6X/LU0mbE+B8y1nxNZ62szs9hXxH/kMhQXpA=; b=aoywBB6xhd+TEBFb11h+NDf8gP2RwoXM/+RGmp2MQvrX60QVIW9ZQhwvi/GaaBIGlw 1nceIjiuGWGD/r7uWcZZeKIQEC4CtIbBD0N/NTiO75PwRgQjtX5bg08om2TWjLdA72ze Wz2mH1m3xdWEN1Lbe3bPVQnp9zQXOgDS2B0wU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ZOSFwWR6X/LU0mbE+B8y1nxNZ62szs9hXxH/kMhQXpA=; b=Cfyjhb2XbLtmiGKWQX6R6NCW+/RlpcS/qIl7Hass+RLRnD7JxdyDYtAFP7sGIZqqhy ZCgV9YsJ0oVjxouzz95xxlE719XgeQz8i0iYH4zZC/p83MDDCR4PM+MDZMh32xe6vkiT eWYjcf2Phe7bpDYYsuwY2akyAMl3ZvZyoeAK5qV6twSu7Vvg9ivhVRl4d6kpiTgd0qJF bCyljQwcguhE8tguKxEQB93TRCVhyl6yD88QQ6pryKRe1iGjVG9fyOAEitf4aJSc/2eO FMxXYJhuoHoUAY6HfMCYz/XWDetFTt8Vg65HJTEcI02TSHqijo0XSWptSPkrKRN+be0T T0MA== X-Gm-Message-State: APjAAAVP65BG7Twx+C0U+SpCQYl59YFpSEHc0W+1P6OM/6bxTh0i7mQw hsDzNlAmtbWFLNtfo8Hp3Y76Dg== X-Google-Smtp-Source: APXvYqykohH7nNYtYXxpXQh6fvYURqf0hwvpGbFY1xMuuDEjZn5yie249qDHWz/KB5Zp3rAJCwnVfA== X-Received: by 2002:a62:2fc6:: with SMTP id v189mr5247034pfv.136.1557866457316; Tue, 14 May 2019 13:40:57 -0700 (PDT) Received: from smtp.gmail.com ([2620:15c:202:1:fa53:7765:582b:82b9]) by smtp.gmail.com with ESMTPSA id p2sm2137pfi.73.2019.05.14.13.40.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 14 May 2019 13:40:56 -0700 (PDT) From: Stephen Boyd To: Rob Herring , Frank Rowand Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Hsin-Yi Wang Subject: [PATCH v2 3/3] of/fdt: Mark initial_boot_params as __ro_after_init Date: Tue, 14 May 2019 13:40:53 -0700 Message-Id: <20190514204053.124122-4-swboyd@chromium.org> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog In-Reply-To: <20190514204053.124122-1-swboyd@chromium.org> References: <20190514204053.124122-1-swboyd@chromium.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The FDT pointer, i.e. initial_boot_params, shouldn't be changed after init. It's only set by boot code and then the only user of the FDT is the raw sysfs reading API. Mark this pointer with __ro_after_init so that the pointer can't be changed after init. Cc: Hsin-Yi Wang Signed-off-by: Stephen Boyd --- drivers/of/fdt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 93414b89735f..f131a1b8588b 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -516,7 +516,7 @@ EXPORT_SYMBOL_GPL(of_fdt_unflatten_tree); int __initdata dt_root_addr_cells; int __initdata dt_root_size_cells; -void *initial_boot_params; +void *initial_boot_params __ro_after_init; #ifdef CONFIG_OF_EARLY_FLATTREE