kernel: Fix LINT64 build.

* Add a needed file to sys/conf/files.

* Shield the drm code from 'DEBUG' being defined via opt_global.h (DEBUG
is a kernel configuration option). This was breaking amdg

kernel: Fix LINT64 build.

* Add a needed file to sys/conf/files.

* Shield the drm code from 'DEBUG' being defined via opt_global.h (DEBUG
is a kernel configuration option). This was breaking amdgpu's atom.c
that defines its own 'DEBUG' macro.

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drm: Update to Linux 4.15.18

* Create /dev/dri/renderD* devices
Generally handle /dev entries creation as close to Linux as possible.

* Add drm master support
Sync authentification code with Li

drm: Update to Linux 4.15.18

* Create /dev/dri/renderD* devices
Generally handle /dev entries creation as close to Linux as possible.

* Add drm master support
Sync authentification code with Linux 4.15.18

* handle vm_mm->mmap_sem in ttm page fault operations

* Update dma-fence code from OpenBSD

* This commit contains sleep/wakeup and other changes
from Matthew Dillon <dillon@apollo.backplane.com>

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drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i91

drm: Update to Linux 4.12.14

* Initial Geminilake support

* Support improvements and model-specific bug fixes for Broxton, Haswell,
Broadwell, Skylake and Kabylake hardware

* Various generic i915 bug fixes, including page flipping and memory
corruption issues

* Minor radeon bug fixes

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drm/linux: Add the "noinline" compiler directive

drm/i915: Update to Linux commit 1f15b76f1ec973d1eb5d21b6d98b21aebb9025f1

"Separate GPU hang waitqueue from advance"

drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvement

drm: Update generic, ttm and radeon code to Linux 4.9

* Generally cleanup non driver-specific code and increase its
robustness

* DisplayPort support improvements

* Atomic modesetting improvements

* Radeon performance and stability improvements

* drm/i915 stays based on Linux 4.7.10 with Linux 4.19 changes
for now

Reviewed-by: Romick

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kernel - Bring in __read_mostly etc

* Bring __read_mostly, __read_frequently, and __exclusive_cache_line
in from FreeBSD.

* Remove linux compat __read_mostly now that we have a real one.

Taken-F

kernel - Bring in __read_mostly etc

* Bring __read_mostly, __read_frequently, and __exclusive_cache_line
in from FreeBSD.

* Remove linux compat __read_mostly now that we have a real one.

Taken-From: FreeBSD/mjg_

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drm/linux: Improve RCU support

Add more RCU directives, make sure existing ones are more correct.

drm/linux: Rewrite READ_ONCE() and WRITE_ONCE()

These macros were broken when used with some complex types like
pointers to pointers.

drm/linux: Add READ_ONCE and WRITE_ONCE

Obtained-from: FreeBSD

drm: Add ACCESS_ONCE()

drm: Add barrier()

drm: Update various Linux headers

drm/i915: Update to Linux 3.10

* Page flip improvements, increased robustness after GPU hangs.
Races have been fixed in the vblank and pageflip completion
interrupt handlers of GEN2-GEN4 GPUs.

drm/i915: Update to Linux 3.10

* Page flip improvements, increased robustness after GPU hangs.
Races have been fixed in the vblank and pageflip completion
interrupt handlers of GEN2-GEN4 GPUs.

* Hotplug IRQ storm detection and mitigation.

* Various bug fixes and performance improvements from GEN4 to
Haswell GPUs.
Less "Unclaimed register" messages should be visible on Haswell.

* Improved support for Valleyview / Baytrail GPUs.

* Better overclocking support from Sandy Bridge to Haswell.
Improved frequency scaling (turbo) on Haswell.

* Improved display detection and modesetting. It is now possible to
precompute possible desired display pipe configurations without
changing the hardware state.

* Daniel Vetter's blog contains more detailed information:
http://blog.ffwll.ch/2013/04/neat-drmi915-stuff-for-310.html

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kernel/drm: Fix -Winit-self.

While here, define __must_check to __heedresult, the equivalent in
DragonFly, and fix one warning which fell out.

drm: Sync a few headers with Linux 3.8

drm: Add linux/compiler.h from the FreeBSD OFED stack