Re: [PATCH v2] dma-buf: Rename dma-ops to prevent conflict with kunmap_atomic macro

[Laura Abbott]

On 04/19/2017 12:36 PM, Logan Gunthorpe wrote:
> Seeing the kunmap_atomic dma_buf_ops share the same name with a macro
> in highmem.h, the former can be aliased if any dma-buf user includes
> that header.
>
> I'm personally trying to include highmem.h inside scatterlist.h and this
> breaks the dma-buf code proper.
>
> Christoph Hellwig suggested [1] renaming it and pushing this patch ASAP.
>
> To maintain consistency I've renamed all four of kmap* and kunmap* to be
> map* and unmap*. (Even though only kmap_atomic presently conflicts.)
>
> [1] https://www.spinics.net/lists/target-devel/msg15070.html
>
> Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
> Reviewed-by: Sinclair Yeh <syeh@xxxxxxxxxx>
> ---
>
> Changes since v1:
>
> - Added the missing tegra driver (noticed by kbuild robot)
> - Rebased off of drm-intel-next to get the i915 selftest that is new
> - Fixed nits Sinclair pointed out.
>
>   drivers/dma-buf/dma-buf.c                      | 16 ++++++++--------
>   drivers/gpu/drm/armada/armada_gem.c            |  8 ++++----
>   drivers/gpu/drm/drm_prime.c                    |  8 ++++----
>   drivers/gpu/drm/i915/i915_gem_dmabuf.c         |  8 ++++----
>   drivers/gpu/drm/i915/selftests/mock_dmabuf.c   |  8 ++++----
>   drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c      |  8 ++++----
>   drivers/gpu/drm/tegra/gem.c                    |  8 ++++----
>   drivers/gpu/drm/udl/udl_dmabuf.c               |  8 ++++----
>   drivers/gpu/drm/vmwgfx/vmwgfx_prime.c          |  8 ++++----
>   drivers/media/v4l2-core/videobuf2-dma-contig.c |  4 ++--
>   drivers/media/v4l2-core/videobuf2-dma-sg.c     |  4 ++--
>   drivers/media/v4l2-core/videobuf2-vmalloc.c    |  4 ++--
>   drivers/staging/android/ion/ion.c              |  8 ++++----
>   include/linux/dma-buf.h                        | 22 +++++++++++-----------
>   14 files changed, 61 insertions(+), 61 deletions(-)

For Ion,

Acked-by: Laura Abbott <labbott@xxxxxxxxxx>

I did some major Ion refactoring but I don't think this
will conflict.

Thanks,
Laura