git: Revert "drm/ttm: Remove ttm_bo_unreserve_core()"

[Francois Tigeot]

commit 46035c87e8ea0b07478acee2b68e51cf7815279d
Author: François Tigeot <***@wolfpond.org>
Date: Sat Nov 24 14:12:34 2018 +0100

Revert "drm/ttm: Remove ttm_bo_unreserve_core()"

This reverts commit 5d4803440754b62fed1abd6d641d1f7a6f7b454e.

The drm/radeon driver has a tendency to lock up more frequently
without ttm_bo_unreserve_core().

Reported-by: Michael Neumann <***@ntecs.de>

Summary of changes:
sys/dev/drm/ttm/ttm_bo.c | 44 +++++++++++++++++++++++++++++++-------------
1 file changed, 31 insertions(+), 13 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/46035c87e8ea0b07478acee2b68e51cf7815279d