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 E6645CA601E for ; Fri, 9 Oct 2026 18:38:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2951710EAFC; Fri, 9 Oct 2026 18:38:41 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="fPHU9jLb"; 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 19A9410EAFC for ; Fri, 9 Oct 2026 18:38:40 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 0DBCB60267; Fri, 9 Oct 2026 18:38:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D9D2E1F000FF; Fri, 9 Oct 2026 18:38:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791571118; bh=bqkQD/zP3J/tsQX0wRYaRbA+6NDUvRGYQYgejR63mTI=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=fPHU9jLbul+/4priEHwM5cMJmSkp5TZOvUXZjyQ+rggeFCpFZAxMCYjacDkttnhzZ TUkupONBhkz/nHkXc1/a6ayr2NQnBn0P2Pz8PPE26E5zQnk6TPl3sAHJKDYahBzxK0 rmtDbReGqteyF2CFU0N9+64i8Mf6omg0B7YH7vMcIzJVTt3yOcXmJ7HVz0nHlbBYlh Rk+yTQIaUoHB3V0wTNK0tawgq4mpzrUViS9KEueG5lJJTjSboRIF8goqzxjDZbor1e Zxp/3CR5lo/4kr3azciAZKZYzCZNmxIAS4n10gYSLfd9Jsl4kSjteakazHk/LmvtCO /5AXw98F1+Erw== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v5 12/38] ALSA: pcm: use vm_insert_page() to map PCM status page To: =?utf-8?b?TG9yZW56byBTdG9ha2VzIChBUk0p?= Cc: linux-usb@vger.kernel.org, "Christian Borntraeger" , "Vasily Gorbik" , kvm@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, dri-devel@lists.freedesktop.org, "Oliver Upton" , "Heiko Carstens" , linux-scsi@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, "Marc Zyngier" , linux-perf-users@vger.kernel.org, "Alexander Gordeev" , kvmarm@lists.linux.dev, selinux@vger.kernel.org In-Reply-To: <20261009-b4-mmap-prepare-vma-flag-sanify-v5-12-923b70125b1e@kernel.org> References: <20261009-b4-mmap-prepare-vma-flag-sanify-v5-0-923b70125b1e@kernel.org> <20261009-b4-mmap-prepare-vma-flag-sanify-v5-12-923b70125b1e@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 09 Oct 2026 18:38:37 +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" > There's no need to keep a fault handler around for this, instead map on > mmap. >=20 > While we're here, rename area to vma to be consistent. >=20 > This correctly makes the mapping a mixed map mapping. >=20 > This works towards establishing the invariant that only PFN mapped or mix= ed > map mappings may clear the VM_MAYWRITE flag. The status page mapping clea= rs > VM_MAYWRITE, so it must not be mm-managed; the control page mapping remai= ns > writable and is left fault-based. >=20 > The assumption is made that the struct pcm_mmap_status structure is at mo= st > a page in size, which is asserted as a build bug. >=20 > This is safe to assume, as the size of the structure is 56 bytes at most. >=20 > Acked-by: Takashi Iwai > Reviewed-by: Suren Baghdasaryan > 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=3D12