[PATCH v3 0/4] drm/udl: Convert to SHMEM

[Thomas Zimmermann]

Udl's GEM implementation is mostly SHMEM and we should attempt to
replace it with the latter.

Patches #1 and #2 update udl to simplify the conversion. In patch #3
the udl code is being replaced by SHMEM. The GEM object's mmap() and
free_object() functions are wrappers around their SHMEM counterparts.
For mmap() we fix-up the page-caching flags to distinguish between
write-combined and cached access. For free(), we have to unmap the
buffer's mapping that has been established by udl's fbdev code.
Patch #4 removes the obsolete udl code.

The patchset has been tested by running the fbdev console, X11 and
Weston on a DisplayLink adapter.

v3:
	* restore udl vmap function that enables caching
v2:
	* remove obsolete udl code in a separate patch

Thomas Zimmermann (4):
  drm/udl: Remove flags field from struct udl_gem_object
  drm/udl: Allocate GEM object via struct drm_driver.gem_create_object
  drm/udl: Switch to SHMEM
  drm/udl: Remove struct udl_gem_object and functions

 drivers/gpu/drm/udl/Kconfig      |   1 +
 drivers/gpu/drm/udl/Makefile     |   2 +-
 drivers/gpu/drm/udl/udl_dmabuf.c | 255 ------------------------------
 drivers/gpu/drm/udl/udl_drv.c    |  30 +---
 drivers/gpu/drm/udl/udl_drv.h    |  36 +----
 drivers/gpu/drm/udl/udl_fb.c     |  66 ++++----
 drivers/gpu/drm/udl/udl_gem.c    | 263 +++++++++----------------------
 7 files changed, 122 insertions(+), 531 deletions(-)
 delete mode 100644 drivers/gpu/drm/udl/udl_dmabuf.c

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2.23.0