From patchwork Thu Nov 17 16:04:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Jacques Hiblot X-Patchwork-Id: 625938 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 83440C433FE for ; Thu, 17 Nov 2022 16:07:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234890AbiKQQFF (ORCPT ); Thu, 17 Nov 2022 11:05:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42458 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239183AbiKQQFA (ORCPT ); Thu, 17 Nov 2022 11:05:00 -0500 Received: from smtpout1.mo528.mail-out.ovh.net (smtpout1.mo528.mail-out.ovh.net [46.105.34.251]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDB115FA7; Thu, 17 Nov 2022 08:04:57 -0800 (PST) Received: from pro2.mail.ovh.net (unknown [10.109.143.168]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 714C813CAD686; Thu, 17 Nov 2022 17:04:55 +0100 (CET) Received: from localhost.localdomain (88.161.25.233) by DAG1EX1.emp2.local (172.16.2.1) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Thu, 17 Nov 2022 17:04:54 +0100 From: Jean-Jacques Hiblot To: , , , , CC: , , , , , , , , Jean-Jacques Hiblot Subject: [PATCH v6 1/6] devres: provide devm_krealloc_array() Date: Thu, 17 Nov 2022 17:04:42 +0100 Message-ID: <20221117160447.294491-2-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221117160447.294491-1-jjhiblot@traphandler.com> References: <20221117160447.294491-1-jjhiblot@traphandler.com> MIME-Version: 1.0 X-Originating-IP: [88.161.25.233] X-ClientProxiedBy: DAG1EX1.emp2.local (172.16.2.1) To DAG1EX1.emp2.local (172.16.2.1) X-Ovh-Tracer-Id: 6604247379654228443 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrgeekgdekvdcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvvefufffkofgjfhgggfgtihesthekredtredttdenucfhrhhomheplfgvrghnqdflrggtqhhuvghsucfjihgslhhothcuoehjjhhhihgslhhothesthhrrghphhgrnhgulhgvrhdrtghomheqnecuggftrfgrthhtvghrnhepudetveelveevgffgvdeuffffjefhheehueeitdegtdejgefhheeuuddugeeffeeunecukfhppeduvdejrddtrddtrddupdekkedrudeiuddrvdehrddvfeefnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepuddvjedrtddrtddruddpmhgrihhlfhhrohhmpeeojhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmqedpnhgspghrtghpthhtohepuddprhgtphhtthhopehlvggvrdhjohhnvghssehlihhnrghrohdrohhrghdpphgrvhgvlhesuhgtfidrtgiipdhrohgshhdoughtsehkvghrnhgvlhdrohhrghdpshhvvghnrdhstghhfigvrhhmvghrseguihhsrhhuphhtihhvvgdqthgvtghhnhholhhoghhivghsrdgtohhmpdhkrhiihihsiihtohhfrdhkohiilhhofihskhhiodgutheslhhinhgrrhhordhorhhgpdhjohhhrghnodhlihhnrghroheskhgvrhhnvghlrdhorhhgpdhmrghrihhjnhdrshhuihhjthgvnhesshhomhgrih hnlhhinhgvrdhorhhgpdgsjhhorhhnrdgrnhguvghrshhsohhnsehlihhnrghrohdrohhrghdprghnugihrdhshhgvvhgthhgvnhhkohesghhmrghilhdrtghomhdpjhgrtggvkhdrrghnrghsiigvfihskhhisehgmhgrihhlrdgtohhmpdhlihhnuhigqdhlvggushesvhhgvghrrdhkvghrnhgvlhdrohhrghdpuggvvhhitggvthhrvggvsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdpoffvtefjohhsthepmhhohedvkedpmhhouggvpehsmhhtphhouhht Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Implement the managed variant of krealloc_array(). This internally uses devm_krealloc() and as such is usable with all memory allocated by devm_kmalloc() (or devres functions using it implicitly like devm_kmemdup(), devm_kstrdup() etc.). Managed realloc'ed chunks can be manually released with devm_kfree(). Signed-off-by: Jean-Jacques Hiblot Reviewed-by: Andy Shevchenko --- include/linux/device.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/device.h b/include/linux/device.h index 424b55df0272..3b472df6c6cd 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -223,6 +223,19 @@ static inline void *devm_kcalloc(struct device *dev, { return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO); } +static inline void *devm_krealloc_array(struct device *dev, + void *p, + size_t new_n, + size_t new_size, + gfp_t flags) +{ + size_t bytes; + + if (unlikely(check_mul_overflow(new_n, new_size, &bytes))) + return NULL; + + return devm_krealloc(dev, p, bytes, flags); +} void devm_kfree(struct device *dev, const void *p); char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) __malloc; const char *devm_kstrdup_const(struct device *dev, const char *s, gfp_t gfp);