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d=hostedemail.com; t=1720159186; a=rsa-sha256; cv=none; b=g96dO0ipAOwX3V7PVX5hpFEMZRgx1PyN0pGPtdFHYrysZJk71w5oIiwzpyA4eYMfyAEHrc OMq48ASwFrpQN6t3leLe5rvfHxm3y/W4ik4+iWtsYUWtaBKWH18pwip5h9xhqZilWFekCK SLz6Nf5QdBYPsnJUo1VtihzQaJq5pMU= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=none; spf=pass (imf07.hostedemail.com: domain of hch@lst.de designates 213.95.11.211 as permitted sender) smtp.mailfrom=hch@lst.de; dmarc=none Received: by verein.lst.de (Postfix, from userid 2407) id CC81268AA6; Fri, 5 Jul 2024 08:00:04 +0200 (CEST) Date: Fri, 5 Jul 2024 08:00:03 +0200 From: Christoph Hellwig To: Leon Romanovsky Cc: Christoph Hellwig , Jens Axboe , Jason Gunthorpe , Robin Murphy , Joerg Roedel , Will Deacon , Keith Busch , "Zeng, Oak" , Chaitanya Kulkarni , Sagi Grimberg , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , Marek Szyprowski , =?iso-8859-1?B?Suly9G1l?= Glisse , Andrew Morton , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Subject: Re: [RFC PATCH v1 00/18] Provide a new two step DMA API mapping API Message-ID: <20240705060003.GB11885@lst.de> References: <20240703054238.GA25366@lst.de> <20240703105253.GA95824@unreal> <20240703143530.GA30857@lst.de> <20240703155114.GB95824@unreal> <20240704074855.GA26913@lst.de> <20240704131839.GD95824@unreal> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240704131839.GD95824@unreal> User-Agent: Mutt/1.5.17 (2007-11-01) X-Stat-Signature: e57kx3c5cd78hm7c54nrsamr7g5mypyg X-Rspamd-Queue-Id: AB45040019 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1720159212-926148 X-HE-Meta: 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 XBNiJsQI ZLoTHr1TE/wAES1BOClOOUu47Za0lozw5lD3HDdtIQ3BgLqIew2UBoWDlhKeUDlfDPcMLxlAyGyZj9+8= 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 Thu, Jul 04, 2024 at 04:18:39PM +0300, Leon Romanovsky wrote: > > 2) The amount of seemingly unrelated global headers pulled into other > > global headers. Some of this might just be sloppiness, e.g. I can't > > see why dma-mapping.h would actually need iommu.h to start with, > > but pci.h in dma-map-ops.h is a no-go. > > pci.h was pulled because I needed to call to pci_p2pdma_map_type() > in dma_can_use_iova(). No, that's not the reason. The reason is actually that whole dev_use_swiotlb mess which shouldn't exist in this form.