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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B71EACA0EE4 for ; Fri, 15 Aug 2025 09:09:22 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 41641900230; Fri, 15 Aug 2025 05:09:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3789E8E0002; Fri, 15 Aug 2025 05:09:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1F2A0900230; Fri, 15 Aug 2025 05:09:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 040268E0002 for ; Fri, 15 Aug 2025 05:09:22 -0400 (EDT) Received: from smtpin06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 3FB9183948 for ; Fri, 15 Aug 2025 09:09:21 +0000 (UTC) X-FDA: 83778418122.06.B083816 Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) by imf23.hostedemail.com (Postfix) with ESMTP id 5118B140009 for ; Fri, 15 Aug 2025 09:09:19 +0000 (UTC) Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=bgdev-pl.20230601.gappssmtp.com header.s=20230601 header.b=w5cQS6hS ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1755248959; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=jWxB7D3jJyBkITTYt/u8P0qX4HLXnEbcjEWeuCzP8c8=; b=AlXxrUqjTvBjDwnXS4wzBf7p5pDP2/H6tiibdzovhgeEApJIvMLgezprS0mslcG7HJBEgs Rq9TCYxX6yh4mosCW1fMySLRIfOYBkGlMGT8T1SQHKLLhaUxaoS4XUaDL+jWqV0E1wrYxa Bn6uzf4TdMGKNLbZY5g7SEVEEGq3Yk8= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=bgdev-pl.20230601.gappssmtp.com header.s=20230601 header.b=w5cQS6hS; spf=none (imf23.hostedemail.com: domain of brgl@bgdev.pl has no SPF policy when checking 209.85.221.45) smtp.mailfrom=brgl@bgdev.pl; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1755248959; a=rsa-sha256; cv=none; b=dIA6VKUNCY9dPglYcNVYuBPch17Gjbo104EQ/QumNDlKGqmEbdbl9kFCZ8uJFhriCJQ5Ut Cj54js+sSj8oroPWr57A5F5O7A34DjShN4RmLqA5xlrp+ldZegjNogwhNYg99QM4Yp0Leg /hR3s5XW08SHRUYcrHVpfoDMOeCPmQA= Received: by mail-wr1-f45.google.com with SMTP id ffacd0b85a97d-3b9e414ef53so1544959f8f.2 for ; Fri, 15 Aug 2025 02:09:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1755248958; x=1755853758; darn=kvack.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=jWxB7D3jJyBkITTYt/u8P0qX4HLXnEbcjEWeuCzP8c8=; b=w5cQS6hSC5BJUMH9qSNnvrtFi0p4RjFrTUHcu4qBWQqNEq2Hw8fiQ7Dfl6mNCCsM/e zRAbyvB8ibaop4ZwGS677W0zip6MYdVeQLC58ls3SEk9zkoZr+X8PWMyPSa1yRzS9OiF gppKe9CPhThYO7RavGNisI+QTsuAH+/XdGiNCvzAD1gpBOskUA7vDEkzJlHiVZejW9s9 RGZxoI6gAVS11tMt3FmvkUrq/Dce/rJYngY8DHcRI0EFZR+1m74mPbh2ik2Bga58O71J gcyhTlb0cftOHTBPKi8Rx8Erja0S5+RTgzj5aTRv5BXA8jVRKtAqHUgBKhz6nl3r9vjX RrHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755248958; x=1755853758; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jWxB7D3jJyBkITTYt/u8P0qX4HLXnEbcjEWeuCzP8c8=; b=jXpIGJs6YHocPXIlkg0ROFFwuQr9NdlzsGwwF6Epe9ZGLAYHeRE7avGzoteMROM8hx rHwpT26GFMJcR87NMO/o7m1YulO97kjVmjW3zmbUUZwL1S0VCDJNBPVM3ZssTntHhSsC rpzfQiNp3HUR2q/SOK4DBNCeHG/GktG4TTIdX2V2dU4dOXNh+2RFZraLUSd+qURDSEyn 5y4PSAyr7w/CqxsFkVHu/8wUj1eOHW0RcDpsFhd5WWFNCAFSG86S1NS7GfZjX6wPpXK3 0m7FgGsKU+cEArBsqWOAnXD+xPR/hiU4pNyF4RRdjBTdrDForJ7OhYnM/HZgxm1dpQiK Ying== X-Forwarded-Encrypted: i=1; AJvYcCXvgdpkiqVChVwRyPyTjJvneO42z6MS58cS1AtP4Qxu5c5vt/XTJm0Tpv2OraOtSXITxCW+KSK2aw==@kvack.org X-Gm-Message-State: AOJu0YwywuOs9HcoFpn2z5ZQ1wD9ff8kMCFNiyGGslgLps0urL7f1h7c frM4IaERQO4tXFG1Zf8MgVn/uAJwwkjrI6NDMxqF8M3NaXLz0T3zyh+ITDI1swDwzCk= X-Gm-Gg: ASbGncvbeviTub6d6qj7bZSNCzNzr6xGAJUrfILYRCkjnGjkXkqOW/a0Kivh1DbP0R1 tAv1SuRFT8TRucdnJcpIO7lORfNVuj7ONLJJ8kxJAXblozr+fh27+E65fxE6sSH7/u/mONPdTES uostEIMFCaB5A6x1qnNCbAtF92ZzP9kMkpkNN+lZ/yMqbi2yTPCaDXl6/2jvX9+0/9JvEfdUc74 5lwQrumr9dbA2WKk3X4HuGO2dlW9e4dt7F5gX/G11JF7Iz8SrLtJOTk7iufOPHkCg5MAJgoDDWB DlDoHSwBTJy2m+dHxiXyDVHuZMP4iqQqmr/r+1GcvKk7rNGv9MEIUZgW+n8Y7Yi9PUDQZ9vaRuT /IwFgJcA0XdJx8wtWAg== X-Google-Smtp-Source: AGHT+IGnCJeDOqE3G4r581ayfk7huZyQHMOX+PmOKQXkUeS7zf7iEj9jqH6oiGPuorRj19lkyqveSA== X-Received: by 2002:a5d:5d11:0:b0:3b7:810f:6caf with SMTP id ffacd0b85a97d-3bb68a1874amr1166149f8f.32.1755248957733; Fri, 15 Aug 2025 02:09:17 -0700 (PDT) Received: from [127.0.1.1] ([2a01:cb1d:dc:7e00:a125:bd3e:6904:c9f9]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3bb676c9a67sm1205210f8f.35.2025.08.15.02.09.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Aug 2025 02:09:17 -0700 (PDT) From: Bartosz Golaszewski Date: Fri, 15 Aug 2025 11:09:03 +0200 Subject: [PATCH v5 01/15] devres: provide devm_kmemdup_const() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250815-pinctrl-gpio-pinfuncs-v5-1-955de9fd91db@linaro.org> References: <20250815-pinctrl-gpio-pinfuncs-v5-0-955de9fd91db@linaro.org> In-Reply-To: <20250815-pinctrl-gpio-pinfuncs-v5-0-955de9fd91db@linaro.org> To: Linus Walleij , Bjorn Andersson , Konrad Dybcio , Alexey Klimov , Lorenzo Bianconi , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , Paul Cercueil , Kees Cook , Andy Shevchenko , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Dong Aisheng , Fabio Estevam , Shawn Guo , Jacky Bai , Pengutronix Kernel Team , NXP S32 Linux Team , Sascha Hauer , Tony Lindgren , Haojian Zhuang , Geert Uytterhoeven , Greg Kroah-Hartman , "Rafael J. Wysocki" , Danilo Krummrich Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-hardening@vger.kernel.org, linux-mm@kvack.org, imx@lists.linux.dev, linux-omap@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Bartosz Golaszewski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2111; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=yGM1a+aC0va5PQYzRl7VigwSABEcy8VUGQM8wt+k8EA=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBonvk2b9jhbpZSR4bPSrpRtG6g+7NeYTvJmeHom mkeMTq5AUSJAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCaJ75NgAKCRARpy6gFHHX ckzrD/9dpMT6eFmPjEdr9qjjRqAOs5l02AiDkl3dHtrzFi9yMxxW2FtEtRuxPAhpHPVWiHPN07r 0RROaKlAKF++hEfZYnZedgxj3QWia5uQqkTZGIk1C6yktsS//GQGe0diPUrRMbSsMNANL6SA3Nx S4wRM4tUkMPqKt23QdTH5TWkZhIsNDbuDR8Zj4iNO/Oe9tiVLXFbPOslY91hsYRIOx+29AVkUu0 nfRh3+Be+5nBAQc73pr8bf0gR8TwhJtXlQ4oMq6OGzCUWMZs0cTeSGFiQdzL6oP9De/SWcMCMPO 3XA0BNI12lUneQ4UuYedE1N0KElf76XPTEx2UrholVQN+5KpqruqPKypec/HgHGhpMQv0ywBWUO kkjEJiumlJd7SzYJ+Cl7t9foAdOHlVGbHrSwhNNAsZ6NP4umioBGxWb3qFwna55mgCL1R1YynSo KPOx6RPkda84XsjOzlOwSqAPBufV3AON+YIKuJBUmKqGk5ba2nja9OqTYjlQEHBOeN2QmF05iUK z+4I82/CtLqSGznLLQbzoJu3sRwnPRgEc1iZEg8oYC/4IqFC6/noCf4YYYvIA7C03q+RTCyPCRn z465BIQ5H0TfkwTOj4sYbbMsTcq7N2mrfE+fqMp4J4jUxTAhjOXedXvSYOIXvvmYPQxWMphF+EQ nh1EvmLIpVJ9QHA== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 5118B140009 X-Stat-Signature: 3fn44atqc5pfi76ra1mex9aejbahpw9f X-Rspam-User: X-HE-Tag: 1755248959-450026 X-HE-Meta: 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 YanS8Xbd LCeFBjgx3tPNEPdvHkXSWLFfCK5ZWqxuxBqMzWoLeG1V/xdOSFPWAEEPtYeU+QH3I/bkXJMDEpH5pb+o= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Bartosz Golaszewski Provide a function similar to devm_strdup_const() but for copying blocks of memory that are likely to be placed in .rodata. Reviewed-by: Andy Shevchenko Signed-off-by: Bartosz Golaszewski --- drivers/base/devres.c | 21 +++++++++++++++++++++ include/linux/device/devres.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/base/devres.c b/drivers/base/devres.c index ff55e1bcfa30057849a352c577bd32f1aa196532..c948c88d395607ff511ffa6eb0a75b7847ab9239 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -1117,6 +1117,27 @@ void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp) } EXPORT_SYMBOL_GPL(devm_kmemdup); +/** + * devm_kmemdup_const - conditionally duplicate and manage a region of memory + * + * @dev: Device this memory belongs to + * @src: memory region to duplicate + * @len: memory region length, + * @gfp: GFP mask to use + * + * Return: source address if it is in .rodata or the return value of kmemdup() + * to which the function falls back otherwise. + */ +const void * +devm_kmemdup_const(struct device *dev, const void *src, size_t len, gfp_t gfp) +{ + if (is_kernel_rodata((unsigned long)src)) + return src; + + return devm_kmemdup(dev, src, len, gfp); +} +EXPORT_SYMBOL_GPL(devm_kmemdup_const); + struct pages_devres { unsigned long addr; unsigned int order; diff --git a/include/linux/device/devres.h b/include/linux/device/devres.h index ae696d10faff4468a41f37b5d5fd679d4ff11997..8c5f57e0d613492fd0b2ec97dd384181608192fc 100644 --- a/include/linux/device/devres.h +++ b/include/linux/device/devres.h @@ -80,6 +80,8 @@ void devm_kfree(struct device *dev, const void *p); void * __realloc_size(3) devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp); +const void * +devm_kmemdup_const(struct device *dev, const void *src, size_t len, gfp_t gfp); static inline void *devm_kmemdup_array(struct device *dev, const void *src, size_t n, size_t size, gfp_t flags) { -- 2.48.1