From patchwork Mon Dec 13 21:53:08 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: 12695979 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3F884C433F5 for ; Mon, 13 Dec 2021 22:08:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3fiKThsg8M7RP8Y0jYUXpuQFIaGHCmMHX10HXNLdAUs=; b=C5Oy0MJ1yCF6KM AwijuZEiihJqMZkjqfR7v4bCqnix9L65qYlWhlFNuNj2EbtnxQZGB3dCxKhLg+IaxJ7zkyivdIsCA jNDHDD/iSbsaJLbJ0mAumTIYALZmx4oSiYzdLYkV3d1s5WR71xTsQnq9bTCdFT3xSTXVdLFnR6R+n MmcHWWRi+UQuU3we946g3yfHkQmmRJ4npIcAvNupGSYzWTfhAbRp6d0SFJYLLMA5V1NUrjZ69RhHO R2DdcH9H9JQmV2MEnpgF9HieXLw4baF9tAkwO0dLOUo4e/skm1UZJn9Kir9BtZK4+dPqL6AWtARb2 pIVH/9v+bJIXuvhg//7w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mwtSp-00BbRt-Ku; Mon, 13 Dec 2021 22:06:33 +0000 Received: from out0.migadu.com ([2001:41d0:2:267::]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mwtGe-00BVzA-9x for linux-arm-kernel@lists.infradead.org; Mon, 13 Dec 2021 21:53:57 +0000 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=1639432434; 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=DErGD3M4prwe4k38EJQv474oTAHhfYAOppngSPgJwzw=; b=xFIm1kk8g+WiU8pAzgzpuH5fydOw1q1u1vCSYeSMuZkffiX6dCbyDl/XjehGxErowQgC0c oJl0kOVg3z6PPytt+7Fb51ZY3rw6V3p9QmHYcledP21es6vtUAzdTH7ZwUZ32XOGivh6lv 1QF99N8XfxMvSxYDzVP0XHQtTT9N32I= From: andrey.konovalov@linux.dev To: Marco Elver , Alexander Potapenko , Andrew Morton Cc: Andrey Konovalov , Dmitry Vyukov , Andrey Ryabinin , kasan-dev@googlegroups.com, linux-mm@kvack.org, Vincenzo Frascino , Catalin Marinas , Will Deacon , Mark Rutland , linux-arm-kernel@lists.infradead.org, Peter Collingbourne , Evgenii Stepanov , linux-kernel@vger.kernel.org, Andrey Konovalov Subject: [PATCH mm v3 18/38] kasan, vmalloc: drop outdated VM_KASAN comment Date: Mon, 13 Dec 2021 22:53:08 +0100 Message-Id: <678a2184509f5622d4a068f762691eb3ef5897af.1639432170.git.andreyknvl@google.com> In-Reply-To: References: MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: andrey.konovalov@linux.dev X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211213_135356_542974_F018DD65 X-CRM114-Status: GOOD ( 11.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 Reviewed-by: Alexander Potapenko --- include/linux/vmalloc.h | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index df5f14458e46..28becb10d013 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -35,17 +35,6 @@ struct notifier_block; /* in notifier.h */ #define VM_DEFER_KMEMLEAK 0 #endif -/* - * 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 */ /*