From patchwork Tue Nov 30 22:06:56 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: 12648269 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 EAC8AC433F5 for ; Tue, 30 Nov 2021 22:08:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 20ED36B007E; Tue, 30 Nov 2021 17:07:10 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 1BDA66B0080; Tue, 30 Nov 2021 17:07:10 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 05F116B0081; Tue, 30 Nov 2021 17:07:09 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0165.hostedemail.com [216.40.44.165]) by kanga.kvack.org (Postfix) with ESMTP id DFB346B007E for ; Tue, 30 Nov 2021 17:07:09 -0500 (EST) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 955A08910A for ; Tue, 30 Nov 2021 22:06:59 +0000 (UTC) X-FDA: 78866982558.16.7396614 Received: from out1.migadu.com (out1.migadu.com [91.121.223.63]) by imf04.hostedemail.com (Postfix) with ESMTP id 50BF950000AD for ; Tue, 30 Nov 2021 22:06:53 +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=1638310017; 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=hv7+PXgzoCzVGKdOPkvt7g4iTK52EYgjPAZOUx+c1O+WrQeXAFAOTNhFK3ZhIDhR/PWo8V HLVNrye0WRaiybeXAC8X1rrv4aBhV0AmRa7ws/CoXP6afp0PlxGtpuJN5hV7igDSQeyTUY 1RLj8uaxV4P3qEEhb5vXxd+iKffqNnU= 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 , linux-arm-kernel@lists.infradead.org, Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH 17/31] kasan, vmalloc: drop outdated VM_KASAN comment Date: Tue, 30 Nov 2021 23:06:56 +0100 Message-Id: In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-Rspamd-Queue-Id: 50BF950000AD X-Stat-Signature: uepz5hzt9zxu8et4doiu3661o9dua7uu Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=hv7+PXgz; dmarc=pass (policy=none) header.from=linux.dev; spf=pass (imf04.hostedemail.com: domain of andrey.konovalov@linux.dev designates 91.121.223.63 as permitted sender) smtp.mailfrom=andrey.konovalov@linux.dev X-Rspamd-Server: rspam02 X-HE-Tag: 1638310013-558350 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 */ /*