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 4AF26CA601F for ; Fri, 9 Oct 2026 18:46:54 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 899F710E561; Fri, 9 Oct 2026 18:46:53 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="EbvOFCwl"; dkim-atps=neutral Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E0A010E561 for ; Fri, 9 Oct 2026 18:46:52 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 3727640A34; Fri, 9 Oct 2026 18:46:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DA6071F000FF; Fri, 9 Oct 2026 18:46:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791571612; bh=HFKBoDKgPdTwbnYnYqRFjYpZs2q39uFT5lOGj3Ocqlo=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=EbvOFCwl7vCmqFIt3haK4QWAALj/vPIXRM+4bVy4Fp9K5f6O7aab0Q5qMaLvGj1LD ZbPbiowO2iup3HXEvEFvKKu84X48KwpxGQLTTrFLvLYdcCloY3B8TbI0kwn4Jnx15W nPAn/aGDGtMgVuWOCntjbUI4rL7Wc245lCbS+NRWfnYy2dedAIoIIg9QByRPTxQ6em MNU+rTEP9SoKPAFsJIX8QwjlziA7pA83ESORBONiCSf4jICiIuQk5ClHkAd4rpCZP3 aJfzH3arqwRQM+rmogzbCXJdcKfC2VOhZA1Opwpa/mzrMIMJbLVSHMVFkfz/SppwCj 3B2dqW0icl31w== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v5 31/38] mm/uffd: use predicates for userfaultfd checks To: =?utf-8?b?TG9yZW56byBTdG9ha2VzIChBUk0p?= Cc: kvmarm@lists.linux.dev, linux-scsi@vger.kernel.org, "Oliver Upton" , "Vasily Gorbik" , linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, "Christian Borntraeger" , linux-trace-kernel@vger.kernel.org, "Heiko Carstens" , kvm@vger.kernel.org, linux-usb@vger.kernel.org, "Alexander Gordeev" , "Marc Zyngier" , selinux@vger.kernel.org, dri-devel@lists.freedesktop.org In-Reply-To: <20261009-b4-mmap-prepare-vma-flag-sanify-v5-31-923b70125b1e@kernel.org> References: <20261009-b4-mmap-prepare-vma-flag-sanify-v5-0-923b70125b1e@kernel.org> <20261009-b4-mmap-prepare-vma-flag-sanify-v5-31-923b70125b1e@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 09 Oct 2026 18:46:50 +0000 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" > Rather than directly checking VMA flags, use the newly introduced > vma_is_mm_managed() and vma_is_mm_backed() helpers in userfaultfd > when assessing VMA suitability for userfaultfd and UFFDIO_MOVE. >=20 > Update vma_move_compatible() so it's expressed in terms of VMA > characteristics rather than arbitrary flags. >=20 > Additionally, update the use of the deprecated VMA flag API when checking > VMA_SHADOW_STACK_BIT. >=20 > A VMA_IO_BIT check is no longer required but that is fine as a hard > invariant has been established that mm-managed mappings may not set > VMA_IO_BIT so the check is now redundant. >=20 > Acked-by: Zi Yan > 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/20261009-b4-mmap-pr= epare-vma-flag-sanify-v5-0-923b70125b1e@kernel.org?part=3D31