linux-kernel - Re: [PATCH 0/9] Use vm_insert

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Message-ID: <CAFqt6zZGP5DnAQd_19xKcLezOYaLsZpPr=FGxiTb7JRjTEJ4cA@mail.gmail.com>
Date:   Wed, 21 Nov 2018 11:54:52 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Michal Hocko <mhocko@...e.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        vbabka@...e.cz, Rik van Riel <riel@...riel.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        rppt@...ux.vnet.ibm.com, Peter Zijlstra <peterz@...radead.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>,
        robin.murphy@....com, iamjoonsoo.kim@....com, treding@...dia.com,
        Kees Cook <keescook@...omium.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        stefanr@...6.in-berlin.de, hjc@...k-chips.com,
        Heiko Stuebner <heiko@...ech.de>, airlied@...ux.ie,
        oleksandr_andrushchenko@...m.com, joro@...tes.org,
        pawel@...iak.com, Kyungmin Park <kyungmin.park@...sung.com>,
        mchehab@...nel.org, Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>
Cc:     linux-kernel@...r.kernel.org, Linux-MM <linux-mm@...ck.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux1394-devel@...ts.sourceforge.net,
        dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, xen-devel@...ts.xen.org,
        iommu@...ts.linux-foundation.org, linux-media@...r.kernel.org
Subject: Re: [PATCH 0/9] Use vm_insert_range

On Thu, Nov 15, 2018 at 9:09 PM Souptick Joarder <jrdr.linux@...il.com> wrote:
>
> Previouly drivers have their own way of mapping range of
> kernel pages/memory into user vma and this was done by
> invoking vm_insert_page() within a loop.
>
> As this pattern is common across different drivers, it can
> be generalized by creating a new function and use it across
> the drivers.
>
> vm_insert_range is the new API which will be used to map a
> range of kernel memory/pages to user vma.
>
> All the applicable places are converted to use new vm_insert_range
> in this patch series.
>
> Souptick Joarder (9):
>   mm: Introduce new vm_insert_range API
>   arch/arm/mm/dma-mapping.c: Convert to use vm_insert_range
>   drivers/firewire/core-iso.c: Convert to use vm_insert_range
>   drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range
>   drm/xen/xen_drm_front_gem.c: Convert to use vm_insert_range
>   iommu/dma-iommu.c: Convert to use vm_insert_range
>   videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range
>   xen/gntdev.c: Convert to use vm_insert_range
>   xen/privcmd-buf.c: Convert to use vm_insert_range

Any further comment on driver changes ?
>
>  arch/arm/mm/dma-mapping.c                         | 21 ++++++-----------
>  drivers/firewire/core-iso.c                       | 15 ++----------
>  drivers/gpu/drm/rockchip/rockchip_drm_gem.c       | 20 ++--------------
>  drivers/gpu/drm/xen/xen_drm_front_gem.c           | 20 +++++-----------
>  drivers/iommu/dma-iommu.c                         | 12 ++--------
>  drivers/media/common/videobuf2/videobuf2-dma-sg.c | 23 ++++++-------------
>  drivers/xen/gntdev.c                              | 11 ++++-----
>  drivers/xen/privcmd-buf.c                         |  8 ++-----
>  include/linux/mm_types.h                          |  3 +++
>  mm/memory.c                                       | 28 +++++++++++++++++++++++
>  mm/nommu.c                                        |  7 ++++++
>  11 files changed, 70 insertions(+), 98 deletions(-)
>
> --
> 1.9.1
>