From patchwork Mon Apr 11 18:56:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 560866 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 D988DC433F5 for ; Mon, 11 Apr 2022 19:05:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347299AbiDKTHS convert rfc822-to-8bit (ORCPT ); Mon, 11 Apr 2022 15:07:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349356AbiDKTHK (ORCPT ); Mon, 11 Apr 2022 15:07:10 -0400 Received: from cloudserver094114.home.pl (cloudserver094114.home.pl [79.96.170.134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9BFD3337C; Mon, 11 Apr 2022 12:04:30 -0700 (PDT) Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 5.0.0) id b5eec240c5abce10; Mon, 11 Apr 2022 21:04:28 +0200 Received: from kreacher.localnet (unknown [213.134.175.113]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 4F86066BDFE; Mon, 11 Apr 2022 21:04:28 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux ACPI Cc: LKML , Bob Moore Subject: [PATCH 11/20] ACPICA: Headers: Replace zero-length array with flexible-array member Date: Mon, 11 Apr 2022 20:56:15 +0200 Message-ID: <5732090.MhkbZ0Pkbq@kreacher> In-Reply-To: <5578328.DvuYhMxLoT@kreacher> References: <5578328.DvuYhMxLoT@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 213.134.175.113 X-CLIENT-HOSTNAME: 213.134.175.113 X-VADE-SPAMSTATE: clean X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvvddrudekiedgudefhecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfjqffogffrnfdpggftiffpkfenuceurghilhhouhhtmecuudehtdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvufffkfgjfhgggfgtsehtqhertddttdejnecuhfhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqnecuggftrfgrthhtvghrnhepudeftefghedvvdetudfhkeegffeihfdugfevleevvddvkeevvddukeekvdelhefgnecuffhomhgrihhnpeifihhkihhpvgguihgrrdhorhhgpdhkvghrnhgvlhdrohhrghdpghhithhhuhgsrdgtohhmnecukfhppedvudefrddufeegrddujeehrdduudefnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvddufedrudefgedrudejhedruddufedphhgvlhhopehkrhgvrggthhgvrhdrlhhotggrlhhnvghtpdhmrghilhhfrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqedpnhgspghrtghpthhtohepfedprhgtphhtthhopehlihhnuhigqdgrtghpihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehrohgsvghrthdrmhhoohhrvges ihhnthgvlhdrtghomh X-DCC--Metrics: v370.home.net.pl 1024; Body=3 Fuz1=3 Fuz2=3 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Gustavo A. R. Silva ACPICA commit 98835f452c698b015d4da999944405ecb90da670 There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/acpica/acpica/commit/98835f45 Link: https://github.com/KSPP/linux/issues/78 Signed-off-by: Gustavo A. R. Silva Reviewed-by: Kees Cook Signed-off-by: Rafael J. Wysocki Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- include/acpi/actbl2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-pm/include/acpi/actbl2.h =================================================================== --- linux-pm.orig/include/acpi/actbl2.h +++ linux-pm/include/acpi/actbl2.h @@ -2310,7 +2310,7 @@ struct acpi_table_rgrt { u16 version; u8 image_type; u8 reserved; - u8 image[0]; + u8 image[]; }; /* image_type values */