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    drm: Split drm_map and drm_local_map · f77d390c
    Benjamin Herrenschmidt 提交于
    Once upon a time, the DRM made the distinction between the drm_map
    data structure exchanged with user space and the drm_local_map used
    in the kernel.
    
    For some reasons, while the BSD port still has that "feature", the
    linux part abused drm_map for kernel internal usage as the local
    map only existed as a typedef of the struct drm_map.
    
    This patch fixes it by declaring struct drm_local_map separately
    (though its content is currently identical to the userspace variant),
    and changing the kernel code to only use that, except when it's a
    user<->kernel interface (ie. ioctl).
    
    This allows subsequent changes to the in-kernel format
    
    I've also replaced the use of drm_local_map_t with struct drm_local_map
    in a couple of places. Mostly by accident but they are the same (the
    former is a typedef of the later) and I have some remote plans and
    half finished patch to completely kill the drm_local_map_t typedef
    so I left those bits in.
    Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
    Acked-by: NEric Anholt <eric@anholt.net>
    Signed-off-by: NDave Airlie <airlied@linux.ie>
    f77d390c
drm_memory.c 5.3 KB