From mboxrd@z Thu Jan 1 00:00:00 1970 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 366F6C88E72 for ; Mon, 14 Sep 2026 22:08:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5B50110F2B2; Mon, 14 Sep 2026 22:08:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="lO0Ce06w"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7C54410F2B2 for ; Mon, 14 Sep 2026 22:08:39 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 9E83A60252; Mon, 14 Sep 2026 22:08:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 784CD1F000FF; Mon, 14 Sep 2026 22:08:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789423718; bh=WoNRymsDtMx0indCFrDBQWLcq1c1c1hScGVe9WFZ1a0=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=lO0Ce06wepaswViDsWnuypcA16rVVixQFdjlmi07ll8y1RISY8730mNqykbmyBOs3 +/sVxQSJpPAc2ypIprbhpD69WIYyD29pBaH2ALbSb4k+j8qA5ZWhF8wEmbjW0dbshC PlGc1w9CVv7vqKxQIiff645szr42N5PhCce6/6odVkMM21iBldMFMXb0/zG6fSPL9o PuzhpeEbHjHRUtDf8Qg+7MYKuRtdMyNCTTbnkdaMUZa9MYzptJfH6ewss1SdvAyFPT cLj5XbZ0FBTZHckabJuv+iRk5MUGZCJp/WOUD558WLjeAZ7YjXNbPvbXC+Ps0CRWzI 3Tom2Icbh+GyQ== From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 29/40] mm: drop some redundant checks around hugetlb VMAs To: =?utf-8?b?TG9yZW56byBTdG9ha2VzIChBUk0p?= Cc: linux-s390@vger.kernel.org, "Alexander Gordeev" , linux-scsi@vger.kernel.org, linux-perf-users@vger.kernel.org, "Heiko Carstens" , linux-rdma@vger.kernel.org, "Christian Borntraeger" , dri-devel@lists.freedesktop.org, selinux@vger.kernel.org, kvm@vger.kernel.org, linux-trace-kernel@vger.kernel.org, "Vasily Gorbik" , "Marc Zyngier" , "Oliver Upton" , bpf@vger.kernel.org, kvmarm@lists.linux.dev In-Reply-To: <20260914-b4-mmap-prepare-vma-flag-sanify-v2-29-7d9781ed5361@kernel.org> References: <20260914-b4-mmap-prepare-vma-flag-sanify-v2-0-7d9781ed5361@kernel.org> <20260914-b4-mmap-prepare-vma-flag-sanify-v2-29-7d9781ed5361@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 14 Sep 2026 22:08:37 +0000 Message-Id: <20260914220837.784CD1F000FF@smtp.kernel.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" > Adjust code which inadvertently perform redundant checks on hugetlb VMAs > and clean them up: >=20 > * hugetlb VMAs have VMA_DONTEXPAND_BIT set so a VMA_SPECIAL_FLAGS check > suffices. (migrate_vma_setup() regains an explicit hugetlb test later in > the series, once VMA_SPECIAL_FLAGS is removed.) >=20 > * hugetlb VMAs unconditionally set vma->vm_ops, so they are never > anonymous. >=20 > * hugetlb VMAs do not set VMA_PFNMAP_BIT so checking for this is redundan= t. >=20 > While we're here also drop a VM_BUG_ON() which the simplified check above > makes unreachable, and use the new VMA flag API. >=20 > No functional change intended. >=20 > Acked-by: Marc Zyngier > Signed-off-by: Lorenzo Stoakes (ARM) Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260914-b4-mmap-pr= epare-vma-flag-sanify-v2-0-7d9781ed5361@kernel.org?part=3D29