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<title>kernel/include/drm/drm_gem_shmem_helper.h, branch linux-5.2.y</title>
<subtitle>Hosts the 0x221E linux distro kernel.</subtitle>
<id>https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-5.2.y</id>
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<link rel='alternate' type='text/html' href='https://universe.0xinfinity.dev/distro/kernel/'/>
<updated>2019-03-14T19:06:44Z</updated>
<entry>
<title>drm: Add library for shmem backed GEM objects</title>
<updated>2019-03-14T19:06:44Z</updated>
<author>
<name>Noralf Trønnes</name>
<email>noralf@tronnes.org</email>
</author>
<published>2019-03-13T00:43:44Z</published>
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<content type='text'>
This adds a library for shmem backed GEM objects.

v8:
- export drm_gem_shmem_create_with_handle
- call mapping_set_gfp_mask to set default zone to GFP_HIGHUSER
- Add helper drm_gem_shmem_get_pages_sgt()

v7:
- Use write-combine for mmap instead. This is the more common
  case. (robher)

v6:
- Fix uninitialized variable issue in an error path (anholt).
- Add a drm_gem_shmem_vm_open() to the fops to get proper refcounting
  of the pages (anholt).

v5:
- Drop drm_gem_shmem_prime_mmap() (Daniel Vetter)
- drm_gem_shmem_mmap(): Subtract drm_vma_node_start() to get the real
  vma-&gt;vm_pgoff
- drm_gem_shmem_fault(): Use vmf-&gt;pgoff now that vma-&gt;vm_pgoff is correct

v4:
- Drop cache modes (Thomas Hellstrom)
- Add a GEM attached vtable

v3:
- Grammar (Sam Ravnborg)
- s/drm_gem_shmem_put_pages_unlocked/drm_gem_shmem_put_pages_locked/
  (Sam Ravnborg)
- Add debug output in error path (Sam Ravnborg)

Signed-off-by: Noralf Trønnes &lt;noralf@tronnes.org&gt;
Signed-off-by: Eric Anholt &lt;eric@anholt.net&gt;
Signed-off-by: Rob Herring &lt;robh@kernel.org&gt;
Signed-off-by: Eric Anholt &lt;eric@anholt.net&gt;
Reviewed-by: Eric Anholt &lt;eric@anholt.net&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20190313004344.24169-1-robh@kernel.org
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