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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0E05ECF45C9 for ; Mon, 12 Jan 2026 19:32:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 745A86B0005; Mon, 12 Jan 2026 14:32:15 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 6FD7B6B0099; Mon, 12 Jan 2026 14:32:15 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5FF146B009E; Mon, 12 Jan 2026 14:32:15 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 4DC926B0005 for ; Mon, 12 Jan 2026 14:32:15 -0500 (EST) Received: from smtpin12.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id E5A30BD68C for ; Mon, 12 Jan 2026 19:32:14 +0000 (UTC) X-FDA: 84324307788.12.B1A3F30 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf03.hostedemail.com (Postfix) with ESMTP id 3D2C820004 for ; Mon, 12 Jan 2026 19:32:13 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="j/IL0uF9"; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1768246333; a=rsa-sha256; cv=none; b=SuhI5uIQZ8eoOt6MH9qUjKBR2v2sQR6NCToiUWoWm5E7p3GREeJRy1C3nEBHJfa4wmcvsK 1WIwPb7ukrKtCKdMd9UWQRaddoBHIlFClvqTu89EBoIRHQhoD05NR0GDL48Ofc7NH1s/DC bmIEJwGR0Eao15lAIypbcCHcsXBuAC8= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b="j/IL0uF9"; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf03.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1768246333; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=H+KFqra2XACKbkUQYygnufJQTkSDAnPP4+682CsDCj8=; b=3mgb6Nfe1itux5BqldCq3IfJIWX75mN4ulFW+HnnjcFl/PfcbUDcOY4B9lHNu4wMZPOFL+ YbrEAeXLKVvsb8ujN4fBE6q4fLbgpGYiDsQoyEo3zpW/9USY6rVMLG+FkwJSevRfW5I+Q7 AchjYgyt1A/NNwNjkkWs08RFf4TzFyk= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 8B9106001D; Mon, 12 Jan 2026 19:32:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 143FEC116D0; Mon, 12 Jan 2026 19:32:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768246332; bh=Cgs0Iid3CB2fSR2T7H1uIjojnsBHit8OyQ9XPBpYu0w=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=j/IL0uF9F0OX/qhxxLaaD7L2ZjRepCGDawc12TuI27HnhSDHscuu9ZBiyLHKhxqEA 7OvA7cb7U9tE1hy52naK4hLJLmzTZhFT43QK8T1EBBKEntNr57n03Ej4EQNwAvEDv1 vDsL6D0O3PCxZVpgapbEi7hZ43x37cSrLuzSAiaJ2wDxgGJjLZKBZkRPm3W2cU8MaW Kyv8e3rk+lPWCPFTb3bvDOZLi2cgiRO2++lI0h47s4p599s1ODN8uLPDSdYp8FJv34 s7oZvT5rZ1+C2794OYA0tuL8MaWcLz3esSCqqear3Gd3zLdWzCfqsj5oQW0ofmVyK2 0Nj4eUDzBeioA== Message-ID: <8657edca-dcff-48d6-84a3-df23521a94a2@kernel.org> Date: Mon, 12 Jan 2026 20:32:05 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] mm_zone: Generalise has_managed_dma() To: Robin Murphy , m.szyprowski@samsung.com, akpm@linux-foundation.org, vbabka@suse.cz Cc: bhe@redhat.com, iommu@lists.linux-foundation.org, linux-mm@kvack.org, vladimir.kondratiev@mobileye.com, s-adivi@ti.com, linux-kernel@vger.kernel.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, rppt@kernel.org, surenb@google.com, mhocko@suse.com, jackmanb@google.com, hannes@cmpxchg.org, ziy@nvidia.com References: From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAa2VybmVsLm9yZz7CwY0EEwEIADcWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCaKYhwAIbAwUJJlgIpAILCQQVCgkIAhYCAh4FAheAAAoJEE3eEPcA/4Naa5EP/3a1 9sgS9m7oiR0uenlj+C6kkIKlpWKRfGH/WvtFaHr/y06TKnWn6cMOZzJQ+8S39GOteyCCGADh 6ceBx1KPf6/AvMktnGETDTqZ0N9roR4/aEPSMt8kHu/GKR3gtPwzfosX2NgqXNmA7ErU4puf zica1DAmTvx44LOYjvBV24JQG99bZ5Bm2gTDjGXV15/X159CpS6Tc2e3KvYfnfRvezD+alhF XIym8OvvGMeo97BCHpX88pHVIfBg2g2JogR6f0PAJtHGYz6M/9YMxyUShJfo0Df1SOMAbU1Q Op0Ij4PlFCC64rovjH38ly0xfRZH37DZs6kP0jOj4QdExdaXcTILKJFIB3wWXWsqLbtJVgjR YhOrPokd6mDA3gAque7481KkpKM4JraOEELg8pF6eRb3KcAwPRekvf/nYVIbOVyT9lXD5mJn IZUY0LwZsFN0YhGhQJ8xronZy0A59faGBMuVnVb3oy2S0fO1y/r53IeUDTF1wCYF+fM5zo14 5L8mE1GsDJ7FNLj5eSDu/qdZIKqzfY0/l0SAUAAt5yYYejKuii4kfTyLDF/j4LyYZD1QzxLC MjQl36IEcmDTMznLf0/JvCHlxTYZsF0OjWWj1ATRMk41/Q+PX07XQlRCRcE13a8neEz3F6we 08oWh2DnC4AXKbP+kuD9ZP6+5+x1H1zEzsFNBFXLn5EBEADn1959INH2cwYJv0tsxf5MUCgh Cj/CA/lc/LMthqQ773gauB9mN+F1rE9cyyXb6jyOGn+GUjMbnq1o121Vm0+neKHUCBtHyseB fDXHA6m4B3mUTWo13nid0e4AM71r0DS8+KYh6zvweLX/LL5kQS9GQeT+QNroXcC1NzWbitts 6TZ+IrPOwT1hfB4WNC+X2n4AzDqp3+ILiVST2DT4VBc11Gz6jijpC/KI5Al8ZDhRwG47LUiu Qmt3yqrmN63V9wzaPhC+xbwIsNZlLUvuRnmBPkTJwwrFRZvwu5GPHNndBjVpAfaSTOfppyKB Tccu2AXJXWAE1Xjh6GOC8mlFjZwLxWFqdPHR1n2aPVgoiTLk34LR/bXO+e0GpzFXT7enwyvF FFyAS0Nk1q/7EChPcbRbhJqEBpRNZemxmg55zC3GLvgLKd5A09MOM2BrMea+l0FUR+PuTenh 2YmnmLRTro6eZ/qYwWkCu8FFIw4pT0OUDMyLgi+GI1aMpVogTZJ70FgV0pUAlpmrzk/bLbRk F3TwgucpyPtcpmQtTkWSgDS50QG9DR/1As3LLLcNkwJBZzBG6PWbvcOyrwMQUF1nl4SSPV0L LH63+BrrHasfJzxKXzqgrW28CTAE2x8qi7e/6M/+XXhrsMYG+uaViM7n2je3qKe7ofum3s4v q7oFCPsOgwARAQABwsF8BBgBCAAmAhsMFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAmic2qsF CSZYCKEACgkQTd4Q9wD/g1oq0xAAsAnw/OmsERdtdwRfAMpC74/++2wh9RvVQ0x8xXvoGJwZ rk0Jmck1ABIM//5sWDo7eDHk1uEcc95pbP9XGU6ZgeiQeh06+0vRYILwDk8Q/y06TrTb1n4n 7FRwyskKU1UWnNW86lvWUJuGPABXjrkfL41RJttSJHF3M1C0u2BnM5VnDuPFQKzhRRktBMK4 GkWBvXlsHFhn8Ev0xvPE/G99RAg9ufNAxyq2lSzbUIwrY918KHlziBKwNyLoPn9kgHD3hRBa Yakz87WKUZd17ZnPMZiXriCWZxwPx7zs6cSAqcfcVucmdPiIlyG1K/HIk2LX63T6oO2Libzz 7/0i4+oIpvpK2X6zZ2cu0k2uNcEYm2xAb+xGmqwnPnHX/ac8lJEyzH3lh+pt2slI4VcPNnz+ vzYeBAS1S+VJc1pcJr3l7PRSQ4bv5sObZvezRdqEFB4tUIfSbDdEBCCvvEMBgoisDB8ceYxO cFAM8nBWrEmNU2vvIGJzjJ/NVYYIY0TgOc5bS9wh6jKHL2+chrfDW5neLJjY2x3snF8q7U9G EIbBfNHDlOV8SyhEjtX0DyKxQKioTYPOHcW9gdV5fhSz5tEv+ipqt4kIgWqBgzK8ePtDTqRM qZq457g1/SXSoSQi4jN+gsneqvlTJdzaEu1bJP0iv6ViVf15+qHuY5iojCz8fa0= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 3D2C820004 X-Stat-Signature: 87w14r1eo8e5ep5t6zo7p5isusgbypk7 X-Rspam-User: X-HE-Tag: 1768246333-914076 X-HE-Meta: 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 NoIaYaoG 5hzzCzwbpzVjJuQ2wha7qACjviUfJFNKR3NLcWtMJ1UHnNf0mYq2eM3SmbkCe6TrCc2NV9+Z/Zd9UCVj/6IPPDr6CTLMd0WX+3rOIH1rePqKv1HRLrCOFWf3OxSIIV/Qtf7eVg15uIkCJKz0EGjloYo3vnOEyAPLgJxpY4n9OE3geMtwY54uVjjq+DS/UNOesPj87nzp7pmMKFx2237QKacu8WNFZxhSkxQ+6iL+2oR3k4x8IDRo57HrnYl1BS9YlZWIxRKAqPUeCz4KwwjLTdU2B1YV/CpWC75ufK8a0a4EzPk/bXw5bnyIGaFrVm2T//ANui3vnv1pEzrycuDMprMS9rAzG0VVWLxmzrgR8XIILvVtRULjwbY+C8iHfu7nCbX8/IbcsSobodi2yjKUFYf3QSf6ZKVC/LQuV 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: List-Subscribe: List-Unsubscribe: On 1/12/26 16:46, Robin Murphy wrote: > It would be useful to be able to check for potential DMA pages beyond > just ZONE_DMA - generalise the existing has_managed_dma() function to > allow checking other zones too. > > Signed-off-by: Robin Murphy > --- Acked-by: David Hildenbrand (Red Hat) -- Cheers David