[PATCH v2 0/7] A few drm_syncobj optimisations

[Tvrtko Ursulin]

From: Tvrtko Ursulin <tvrtko.ursulin at igalia.com>

A small set of drm_syncobj optimisations which should make things a tiny bit
more efficient on the CPU side of things.

Improvement seems to be around 1.5%* more FPS if observed with "vkgears
-present-mailbox" on a Steam Deck Plasma desktop, but I am reluctant to make a
definitive claim on the numbers since there is some run to run variance. It
would be best if someone could verify or suggest a more heavy workload for
syncobjs.

*)
Before average fps after 200s: 22102
After: 22426

Tvrtko Ursulin (7):
  drm/syncobj: Remove unhelpful helper
  drm/syncobj: Do not allocate an array to store zeros when waiting
  drm/syncobj: Avoid one temporary allocation in drm_syncobj_array_find
  drm/syncobj: Use put_user in drm_syncobj_query_ioctl
  drm/syncobj: Avoid temporary allocation in
    drm_syncobj_timeline_signal_ioctl
  drm/syncobj: Add a fast path to drm_syncobj_array_wait_timeout
  drm/syncobj: Add a fast path to drm_syncobj_array_find

 drivers/gpu/drm/drm_syncobj.c | 281 ++++++++++++++++++----------------
 1 file changed, 147 insertions(+), 134 deletions(-)

-- 
2.47.1