[PATCH v2 0/4] drm/exec: drm_exec polishing

["Thomas Hellström" <thomas.hellstrom@linux.intel.com>]

During the work towards enabling exhaustive eviction using full
ww locking in TTM, Christian indicated that the path for the
drm_exec moving forward was to be a full drm_exec helper with
things like userptr validation rather than a WW transaction
abstraction. The idea was then briefly discussed to craft a
WW transaction helper and then subclass that with drm_exec
with the idea that the WW transaction helper could be used in
TTM for eviction and for other uses that didn't mandate a full
exec sequence.

Regardless whether that actually happens or not, this series
aims to clean up abuses of drm_exec internals in drivers
so that future development of drm_exec isn't blocked by
such driver usage.

Except for patch 2 which is a small cleanup only.

v2:
- An drm/msm patch was already merged.
- Use a unique id for the loop variable (patch 1) (Christian)
- Move assignment to declaration (patch 2) (Christian)
- Declare the retry pointer as void *const. (patch 2)
- Only allow if the drm_exec context is newly initialized. (patch 3)
  (Christian)
- Fix amdgpu compile error (patch 4) (Intel CI)
- Update the commit message (patch 4)

Thomas Hellström (4):
  drm/exec: Remove the index parameter from
    drm_exec_for_each_locked_obj[_reverse]
  drm/exec: Make the drm_exec_until_all_locked() macro more readable
  drm/exec, drm/xe: Avoid abusing the drm_exec retry pointer
  drm/exec, drm/xe, drm/amdgpu: Add an accessor for struct
    drm_exec::ticket

 .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c  |  4 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c        | 15 ++--
 .../drm/amd/amdgpu/amdgpu_eviction_fence.c    |  3 +-
 drivers/gpu/drm/drm_exec.c                    |  9 +--
 drivers/gpu/drm/drm_gpuvm.c                   |  3 +-
 drivers/gpu/drm/xe/xe_validation.c            |  4 +-
 drivers/gpu/drm/xe/xe_validation.h            |  2 +-
 drivers/gpu/drm/xe/xe_vm.c                    |  3 +-
 include/drm/drm_exec.h                        | 71 ++++++++++++++-----
 9 files changed, 70 insertions(+), 44 deletions(-)

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2.54.0