git: drm/ttm: Rework ttm_io_prot()

[Francois Tigeot]

commit 4f125aeae976b3eb5c1646e70ad74ed69db62f11
Author: François Tigeot <***@wolfpond.org>
Date: Wed Nov 7 23:18:51 2018 +0100

drm/ttm: Rework ttm_io_prot()

Change it to be as close to the Linux version as possible.

Summary of changes:
sys/dev/drm/include/drm/ttm/ttm_bo_driver.h | 3 +-
sys/dev/drm/ttm/ttm_bo_util.c | 54 +++++++++++++++++++----------
sys/dev/drm/ttm/ttm_bo_vm.c | 4 +--
3 files changed, 39 insertions(+), 22 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/4f125aeae976b3eb5c1646e70ad74ed69db62f11