linux-kernel - [PATCH 0/5] mm: rework hmm to use devm_memremap

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Message-ID: <152694211402.5484.2277538346144115181.stgit@dwillia2-desk3.amr.corp.intel.com>
Date:   Mon, 21 May 2018 15:35:14 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     akpm@...ux-foundation.org
Cc:     stable@...r.kernel.org, Logan Gunthorpe <logang@...tatee.com>,
        Christoph Hellwig <hch@....de>,
        Jérôme Glisse <jglisse@...hat.com>,
        Michal Hocko <mhocko@...e.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/5] mm: rework hmm to use devm_memremap_pages

Hi Andrew, please consider this series for 4.18.

For maintainability, as ZONE_DEVICE continues to attract new users,
it is useful to keep all users consolidated on devm_memremap_pages() as
the interface for create "device pages".

The devm_memremap_pages() implementation was recently reworked to make
it more generic for arbitrary users, like the proposed peer-to-peer
PCI-E enabling. HMM pre-dated this rework and opted to duplicate
devm_memremap_pages() as hmm_devmem_pages_create().

Rework HMM to be a consumer of devm_memremap_pages() directly and fix up
the licensing on the exports given the deep dependencies on the mm.

Patches based on v4.17-rc6 where there are no upstream consumers of the
HMM functionality.

---

Dan Williams (5):
      mm, devm_memremap_pages: mark devm_memremap_pages() EXPORT_SYMBOL_GPL
      mm, devm_memremap_pages: handle errors allocating final devres action
      mm, hmm: use devm semantics for hmm_devmem_{add,remove}
      mm, hmm: replace hmm_devmem_pages_create() with devm_memremap_pages()
      mm, hmm: mark hmm_devmem_{add,add_resource} EXPORT_SYMBOL_GPL

 Documentation/vm/hmm.txt |    1 
 include/linux/hmm.h      |    4 -
 include/linux/memremap.h |    1 
 kernel/memremap.c        |   39 +++++-
 mm/hmm.c                 |  297 +++++++---------------------------------------
 5 files changed, 77 insertions(+), 265 deletions(-)