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[209.132.183.28]) by mx.google.com with ESMTPS id r4si4871320qtb.2.2019.02.12.17.55.44 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 12 Feb 2019 17:55:44 -0800 (PST) Received-SPF: pass (google.com: domain of brouer@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; Authentication-Results: mx.google.com; spf=pass (google.com: domain of brouer@redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=brouer@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1B548C01DDE9; Wed, 13 Feb 2019 01:55:44 +0000 (UTC) Received: from firesoul.localdomain (ovpn-200-20.brq.redhat.com [10.40.200.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id EF59719747; Wed, 13 Feb 2019 01:55:40 +0000 (UTC) Received: from [10.1.2.1] (localhost [IPv6:::1]) by firesoul.localdomain (Postfix) with ESMTP id 22A2731256FC7; Wed, 13 Feb 2019 02:55:40 +0100 (CET) Subject: [net-next PATCH V3 1/3] mm: add dma_addr_t to struct page From: Jesper Dangaard Brouer To: netdev@vger.kernel.org, linux-mm@kvack.org Cc: Toke =?utf-8?q?H=C3=B8iland-J=C3=B8rgensen?= , Ilias Apalodimas , willy@infradead.org, Saeed Mahameed , Alexander Duyck , Jesper Dangaard Brouer , Andrew Morton , mgorman@techsingularity.net, "David S. Miller" , Tariq Toukan Date: Wed, 13 Feb 2019 02:55:40 +0100 Message-ID: <155002294008.5597.13759027075590385810.stgit@firesoul> In-Reply-To: <155002290134.5597.6544755780651689517.stgit@firesoul> References: <155002290134.5597.6544755780651689517.stgit@firesoul> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 13 Feb 2019 01:55:44 +0000 (UTC) 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: The page_pool API is using page->private to store DMA addresses. As pointed out by David Miller we can't use that on 32-bit architectures with 64-bit DMA This patch adds a new dma_addr_t struct to allow storing DMA addresses Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Ilias Apalodimas Acked-by: Andrew Morton --- include/linux/mm_types.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 2c471a2c43fa..0a36a22228e7 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -95,6 +95,13 @@ struct page { */ unsigned long private; }; + struct { /* page_pool used by netstack */ + /** + * @dma_addr: might require a 64-bit value even on + * 32-bit architectures. + */ + dma_addr_t dma_addr; + }; struct { /* slab, slob and slub */ union { struct list_head slab_list; /* uses lru */