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From: Dan Williams <dan.j.williams@intel.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "Jérôme Glisse" <jglisse@redhat.com>,
	"Jason Gunthorpe" <jgg@mellanox.com>,
	"Ben Skeggs" <bskeggs@redhat.com>,
	"Linux MM" <linux-mm@kvack.org>,
	nouveau@lists.freedesktop.org,
	"Maling list - DRI developers" <dri-devel@lists.freedesktop.org>,
	linux-nvdimm <linux-nvdimm@lists.01.org>,
	linux-pci@vger.kernel.org,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Logan Gunthorpe" <logang@deltatee.com>
Subject: Re: [PATCH 08/25] memremap: move dev_pagemap callbacks into a separate structure
Date: Mon, 17 Jun 2019 10:51:35 -0700
Message-ID: <CAPcyv4i_0wUJHDqY91R=x5M2o_De+_QKZxPyob5=E9CCv8rM7A@mail.gmail.com> (raw)
In-Reply-To: <20190617122733.22432-9-hch@lst.de>

On Mon, Jun 17, 2019 at 5:27 AM Christoph Hellwig <hch@lst.de> wrote:
>
> The dev_pagemap is a growing too many callbacks.  Move them into a
> separate ops structure so that they are not duplicated for multiple
> instances, and an attacker can't easily overwrite them.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
> Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
> ---
>  drivers/dax/device.c              | 11 ++++++----
>  drivers/dax/pmem/core.c           |  2 +-
>  drivers/nvdimm/pmem.c             | 19 +++++++++-------
>  drivers/pci/p2pdma.c              |  9 +++++---
>  include/linux/memremap.h          | 36 +++++++++++++++++--------------
>  kernel/memremap.c                 | 18 ++++++++--------
>  mm/hmm.c                          | 10 ++++++---
>  tools/testing/nvdimm/test/iomap.c |  9 ++++----
>  8 files changed, 65 insertions(+), 49 deletions(-)
>
[..]
> diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
> index 219dd0a1cb08..a667d974155e 100644
> --- a/tools/testing/nvdimm/test/iomap.c
> +++ b/tools/testing/nvdimm/test/iomap.c
> @@ -106,11 +106,10 @@ EXPORT_SYMBOL(__wrap_devm_memremap);
>
>  static void nfit_test_kill(void *_pgmap)
>  {
> -       struct dev_pagemap *pgmap = _pgmap;

Whoops, needed to keep this line to avoid:

tools/testing/nvdimm/test/iomap.c:109:11: error: ‘pgmap’ undeclared
(first use in this function); did you mean ‘_pgmap’?

  reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 12:27 dev_pagemap related cleanups v2 Christoph Hellwig
2019-06-17 12:27 ` [PATCH 01/25] mm: remove the unused ARCH_HAS_HMM_DEVICE Kconfig option Christoph Hellwig
2019-06-17 12:27 ` [PATCH 02/25] mm: remove the struct hmm_device infrastructure Christoph Hellwig
2019-06-17 12:27 ` [PATCH 03/25] mm: remove hmm_devmem_add_resource Christoph Hellwig
2019-06-17 12:27 ` [PATCH 04/25] mm: don't clear ->mapping in hmm_devmem_free Christoph Hellwig
2019-06-17 12:27 ` [PATCH 05/25] mm: export alloc_pages_vma Christoph Hellwig
2019-06-17 12:27 ` [PATCH 06/25] mm: factor out a devm_request_free_mem_region helper Christoph Hellwig
2019-06-17 17:37   ` Dan Williams
2019-06-17 17:40     ` Christoph Hellwig
2019-06-17 17:42       ` Christoph Hellwig
2019-06-17 12:27 ` [PATCH 07/25] memremap: validate the pagemap type passed to devm_memremap_pages Christoph Hellwig
2019-06-17 19:02   ` Dan Williams
2019-06-17 19:54     ` Christoph Hellwig
2019-06-17 20:36       ` Dan Williams
2019-06-17 12:27 ` [PATCH 08/25] memremap: move dev_pagemap callbacks into a separate structure Christoph Hellwig
2019-06-17 17:51   ` Dan Williams [this message]
2019-06-17 19:55     ` Christoph Hellwig
2019-06-17 21:09       ` Dan Williams
2019-06-17 20:08   ` Logan Gunthorpe
2019-06-17 20:09     ` Christoph Hellwig
2019-06-17 12:27 ` [PATCH 09/25] memremap: pass a struct dev_pagemap to ->kill and ->cleanup Christoph Hellwig
2019-06-17 12:27 ` [PATCH 10/25] memremap: lift the devmap_enable manipulation into devm_memremap_pages Christoph Hellwig
2019-06-17 19:25   ` Dan Williams
2019-06-17 12:27 ` [PATCH 11/25] memremap: add a migrate_to_ram method to struct dev_pagemap_ops Christoph Hellwig
2019-06-17 12:27 ` [PATCH 12/25] memremap: remove the data field in struct dev_pagemap Christoph Hellwig
2019-06-17 12:27 ` [PATCH 13/25] memremap: replace the altmap_valid field with a PGMAP_ALTMAP_VALID flag Christoph Hellwig
2019-06-17 12:27 ` [PATCH 14/25] memremap: provide an optional internal refcount in struct dev_pagemap Christoph Hellwig
2019-06-17 12:27 ` [PATCH 15/25] device-dax: use the dev_pagemap internal refcount Christoph Hellwig
2019-06-18 19:43   ` Dan Williams
2019-06-17 12:27 ` [PATCH 16/25] PCI/P2PDMA: " Christoph Hellwig
2019-06-17 20:10   ` Logan Gunthorpe
2019-06-17 12:27 ` [PATCH 17/25] nouveau: use alloc_page_vma directly Christoph Hellwig
2019-06-17 12:27 ` [PATCH 18/25] nouveau: use devm_memremap_pages directly Christoph Hellwig
2019-06-17 12:27 ` [PATCH 19/25] mm: remove hmm_vma_alloc_locked_page Christoph Hellwig
2019-06-17 12:27 ` [PATCH 20/25] mm: remove hmm_devmem_add Christoph Hellwig
2019-06-17 12:27 ` [PATCH 21/25] mm: mark DEVICE_PUBLIC as broken Christoph Hellwig
2019-06-17 12:27 ` [PATCH 22/25] mm: simplify ZONE_DEVICE page private data Christoph Hellwig
2019-06-17 12:27 ` [PATCH 23/25] mm: sort out the DEVICE_PRIVATE Kconfig mess Christoph Hellwig
2019-06-17 12:27 ` [PATCH 24/25] mm: remove the HMM config option Christoph Hellwig
2019-06-17 12:27 ` [PATCH 25/25] mm: don't select MIGRATE_VMA_HELPER from HMM_MIRROR Christoph Hellwig
2019-06-18 19:47 ` dev_pagemap related cleanups v2 Dan Williams
2019-06-19  9:40   ` Christoph Hellwig
2019-06-19 16:36     ` Jason Gunthorpe
2019-06-19 16:46       ` Dan Williams
2019-06-19 18:19         ` Jason Gunthorpe
2019-06-20  6:32           ` Christoph Hellwig

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