From patchwork Mon Dec 6 21:43:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: andrey.konovalov@linux.dev X-Patchwork-Id: 12659763 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 AAD44C433F5 for ; Mon, 6 Dec 2021 21:52:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 30D8E6B0072; Mon, 6 Dec 2021 16:46:05 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 294E06B0092; Mon, 6 Dec 2021 16:46:05 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 15CD26B009D; Mon, 6 Dec 2021 16:46:05 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0119.hostedemail.com [216.40.44.119]) by kanga.kvack.org (Postfix) with ESMTP id 061926B0072 for ; Mon, 6 Dec 2021 16:46:05 -0500 (EST) Received: from smtpin26.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id C6AD282499B9 for ; Mon, 6 Dec 2021 21:45:54 +0000 (UTC) X-FDA: 78888702228.26.665754A Received: from out2.migadu.com (out2.migadu.com [188.165.223.204]) by imf06.hostedemail.com (Postfix) with ESMTP id 44671801A8A8 for ; Mon, 6 Dec 2021 21:45:54 +0000 (UTC) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1638827153; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qxn2Xep6jUSip5qM4WVsL2tCgAIiNA6s93LyLl9ypbE=; b=sBk8L+hA2GSdvOEbvDg2sGEJ6BG9LYDOLDc4ayXuZZpgSc8QoAowuwfLwICf8I+5L0fZt1 0sZSRjpfEUfRz0B/0AHqUiuOsb8YqXEb/7XCgdLHNPIKkk13V+1dlWMM9K7Ru9dUjum3hf NPS8tS9D0hluyCZNY8rV9F1yr1j8xfg= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko , Vincenzo Frascino , Catalin Marinas , Peter Collingbourne Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, Andrew Morton , linux-mm@kvack.org, Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH v2 18/34] kasan, vmalloc: drop outdated VM_KASAN comment Date: Mon, 6 Dec 2021 22:43:55 +0100 Message-Id: <4d44c09c5999cf4767803724eb47581294f4341c.1638825394.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 44671801A8A8 X-Stat-Signature: thk3bg131n5etiqpr47ryay7zigtqbg9 Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=sBk8L+hA; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf06.hostedemail.com: domain of andrey.konovalov@linux.dev designates 188.165.223.204 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev X-HE-Tag: 1638827154-82917 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: From: Andrey Konovalov The comment about VM_KASAN in include/linux/vmalloc.c is outdated. VM_KASAN is currently only used to mark vm_areas allocated for kernel modules when CONFIG_KASAN_VMALLOC is disabled. Drop the comment. Signed-off-by: Andrey Konovalov --- include/linux/vmalloc.h | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 6e022cc712e6..b22369f540eb 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -28,17 +28,6 @@ struct notifier_block; /* in notifier.h */ #define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */ #define VM_NO_HUGE_VMAP 0x00000400 /* force PAGE_SIZE pte mapping */ -/* - * VM_KASAN is used slightly differently depending on CONFIG_KASAN_VMALLOC. - * - * If IS_ENABLED(CONFIG_KASAN_VMALLOC), VM_KASAN is set on a vm_struct after - * shadow memory has been mapped. It's used to handle allocation errors so that - * we don't try to poison shadow on free if it was never allocated. - * - * Otherwise, VM_KASAN is set for kasan_module_alloc() allocations and used to - * determine which allocations need the module shadow freed. - */ - /* bits [20..32] reserved for arch specific ioremap internals */ /*