linux-kernel - Re: add a not device managed memremap

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Message-ID: <20190819063015.GA20248@lst.de>
Date:   Mon, 19 Aug 2019 08:30:15 +0200
From:   Christoph Hellwig <hch@....de>
To:     Bharata B Rao <bharata@...ux.ibm.com>
Cc:     Christoph Hellwig <hch@....de>,
        Dan Williams <dan.j.williams@...el.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, linux-nvdimm@...ts.01.org
Subject: Re: add a not device managed memremap_pages v3

On Mon, Aug 19, 2019 at 10:57:52AM +0530, Bharata B Rao wrote:
> On Sun, Aug 18, 2019 at 11:05:53AM +0200, Christoph Hellwig wrote:
> > Hi Dan and Jason,
> > 
> > Bharata has been working on secure page management for kvmppc guests,
> > and one I thing I noticed is that he had to fake up a struct device
> > just so that it could be passed to the devm_memremap_pages
> > instrastructure for device private memory.
> > 
> > This series adds non-device managed versions of the
> > devm_request_free_mem_region and devm_memremap_pages functions for
> > his use case.
> 
> Tested kvmppc ultravisor patchset with migrate_vma changes and this
> patchset. (Had to manually patch mm/memremap.c instead of kernel/memremap.c
> though)

Oh.  I rebased to the hmm tree, and that didn't have the rename yet.
And I didn't even notice that as git handled it transparently.