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 C1849C8303F for ; Thu, 28 Aug 2025 18:53:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D031610E1EA; Thu, 28 Aug 2025 18:53:01 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="E5WBwKoG"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 081C810E1EA for ; Thu, 28 Aug 2025 18:52:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756407178; h=from:from: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; bh=Ox+fdqHLvqvHkCQcV7jSITHMPKa6EWT2tpRcTnamaBA=; b=E5WBwKoGQo9zqO/HLEpsrkpXIOyUZpErlYEJrl85UZI+vKSRJUAQwMGOSSx7lqmu1cb2CU 5fJc4OMGF0GVr4Wi8tvBRYFzTmMWW2MwRdrH7RZy/1YiuyYZ25Najtv/JZrrWbeSqGya4e 4F4ikQb7l52dvkvpxswwKeBKqLFNOfA= Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-175-R9nfyuoLM7qdKmM1Ccu86A-1; Thu, 28 Aug 2025 14:52:57 -0400 X-MC-Unique: R9nfyuoLM7qdKmM1Ccu86A-1 X-Mimecast-MFC-AGG-ID: R9nfyuoLM7qdKmM1Ccu86A_1756407176 Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-3ea4d2f503cso3983665ab.1 for ; Thu, 28 Aug 2025 11:52:57 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756407176; x=1757011976; h=content-transfer-encoding:mime-version:organization:references :in-reply-to:message-id:subject:cc:to:from:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Ox+fdqHLvqvHkCQcV7jSITHMPKa6EWT2tpRcTnamaBA=; b=LmIiJTn9uK4TIgIK0rUzYF+EqwIJHHevVfOk2LtG/EqUXHOsPChwpxWSj6R0qV2gWf BEKQLlsN7lTocKBS+ArWTO6pbSfUjVaZDT4Z5TYMEV4dn/P3g+VnZlxbVkvliJlFkhK8 3e6uCzmYltGT3sVr7yxwLQKUcTJ/7CNZPRFZd3Q7Qb8BP3OCEcrQlEoE1U5HBV3AA3L1 K4xUXR0bfyrwCM22feM9tfpB0cW+WQPlIPPcp2otcm/NRD1oUkR51TugN56+NspR39t5 SIo9LDrdIAm/25pkGR0n6AY6IEpmy6ToTG1erpXfcWb8GrdZQQ9iVJMOyoOecFcfSHT0 +UyQ== X-Forwarded-Encrypted: i=1; AJvYcCUxsYe8Ueq3F5RC6ZfbihBFC/31rAZvn0B/tHfLZX4s/N9TusXOWcJL8BK5UlIqAqO6Jzk2utfiTYw=@lists.freedesktop.org X-Gm-Message-State: AOJu0YyDsKc+HStIyCxY1xYdxBhRD2z6tEZnPU58TnXCpIasa4lkmpPe tq6dK2o5IQQrrUFWUO2tqzdacGPfOBm/wMebRFJy/zkWUbOyq371FqwO/SQO8lK/rT1IRzW2+7T jx4rrJzH5NRLNtNLNemcp5pslhltlrnVFOUF22QrZdLdMfz2y3AQfWBmBHBzRXhFdarOfBg== X-Gm-Gg: ASbGncvaSemRMZlQ8zTqlFdHdtJD2lBxcoW5KskKX8f9V9cR9VIgC5tNJ7EeqMoPtoU Yt6j6Mv4XbUzYrnsq8tljMNEPVI/0HYb975EJqSq6LhhKVqQ+fG1m8EtZyYlAx6lWrwDVYj+zaz U/Tm2gCq5jMnXmtrKbjvwCT3pzlNOK1lQ7CN15zdKooJjKT916fYYHxMG1MN9k68NVbsTIYwucL a+sAsOo+25hgaH5uGSSV6WsmPlpaGJqNzpzd7QGdJdWGBS6ISFWRJpibuuEueActIG8lEnZpVfe 1bksMkkUVIKEmj8UESuq4Gx7j0h+nbTf0zic+tT8T+s= X-Received: by 2002:a05:6e02:1a86:b0:3ee:cb14:e90f with SMTP id e9e14a558f8ab-3eecb14ea03mr61888735ab.7.1756407176410; Thu, 28 Aug 2025 11:52:56 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEP6X5C8fKyFwSWmjzqPdfkbd7PprjZnYQm1xQXLb3Ss2KjE+y/MhfTqxlaUhO3jzRNfBiTrg== X-Received: by 2002:a05:6e02:1a86:b0:3ee:cb14:e90f with SMTP id e9e14a558f8ab-3eecb14ea03mr61888495ab.7.1756407175934; Thu, 28 Aug 2025 11:52:55 -0700 (PDT) Received: from redhat.com ([38.15.36.11]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-50d78c67b4dsm47783173.7.2025.08.28.11.52.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Aug 2025 11:52:54 -0700 (PDT) Date: Thu, 28 Aug 2025 12:52:51 -0600 From: Alex Williamson To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, Brett Creeley , Jason Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alexander Potapenko , Andrew Morton , Brendan Jackman , Christoph Lameter , Dennis Zhou , Dmitry Vyukov , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, iommu@lists.linux.dev, io-uring@vger.kernel.org, Jason Gunthorpe , Jens Axboe , Johannes Weiner , John Hubbard , kasan-dev@googlegroups.com, kvm@vger.kernel.org, "Liam R. Howlett" , Linus Torvalds , linux-arm-kernel@axis.com, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-ide@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mips@vger.kernel.org, linux-mmc@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, Lorenzo Stoakes , Marco Elver , Marek Szyprowski , Michal Hocko , Mike Rapoport , Muchun Song , netdev@vger.kernel.org, Oscar Salvador , Peter Xu , Robin Murphy , Suren Baghdasaryan , Tejun Heo , virtualization@lists.linux.dev, Vlastimil Babka , wireguard@lists.zx2c4.com, x86@kernel.org, Zi Yan Subject: Re: [PATCH v1 31/36] vfio/pci: drop nth_page() usage within SG entry Message-ID: <20250828125251.08e4a429.alex.williamson@redhat.com> In-Reply-To: <20250827220141.262669-32-david@redhat.com> References: <20250827220141.262669-1-david@redhat.com> <20250827220141.262669-32-david@redhat.com> Organization: Red Hat MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: nLFqHENOItRFi0YHtExqYRnuF4sbz6wm3HFjmwRXdi0_1756407176 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Thu, 28 Aug 2025 00:01:35 +0200 David Hildenbrand wrote: > It's no longer required to use nth_page() when iterating pages within a > single SG entry, so let's drop the nth_page() usage. > > Cc: Brett Creeley > Cc: Jason Gunthorpe > Cc: Yishai Hadas > Cc: Shameer Kolothum > Cc: Kevin Tian > Cc: Alex Williamson > Signed-off-by: David Hildenbrand > --- > drivers/vfio/pci/pds/lm.c | 3 +-- > drivers/vfio/pci/virtio/migrate.c | 3 +-- > 2 files changed, 2 insertions(+), 4 deletions(-) > > diff --git a/drivers/vfio/pci/pds/lm.c b/drivers/vfio/pci/pds/lm.c > index f2673d395236a..4d70c833fa32e 100644 > --- a/drivers/vfio/pci/pds/lm.c > +++ b/drivers/vfio/pci/pds/lm.c > @@ -151,8 +151,7 @@ static struct page *pds_vfio_get_file_page(struct pds_vfio_lm_file *lm_file, > lm_file->last_offset_sg = sg; > lm_file->sg_last_entry += i; > lm_file->last_offset = cur_offset; > - return nth_page(sg_page(sg), > - (offset - cur_offset) / PAGE_SIZE); > + return sg_page(sg) + (offset - cur_offset) / PAGE_SIZE; > } > cur_offset += sg->length; > } > diff --git a/drivers/vfio/pci/virtio/migrate.c b/drivers/vfio/pci/virtio/migrate.c > index ba92bb4e9af94..7dd0ac866461d 100644 > --- a/drivers/vfio/pci/virtio/migrate.c > +++ b/drivers/vfio/pci/virtio/migrate.c > @@ -53,8 +53,7 @@ virtiovf_get_migration_page(struct virtiovf_data_buffer *buf, > buf->last_offset_sg = sg; > buf->sg_last_entry += i; > buf->last_offset = cur_offset; > - return nth_page(sg_page(sg), > - (offset - cur_offset) / PAGE_SIZE); > + return sg_page(sg) + (offset - cur_offset) / PAGE_SIZE; > } > cur_offset += sg->length; > } Reviewed-by: Alex Williamson