sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

drm2: Remove unused variables.

Revert drm2 removal.

Revert r338177, r338176, r338175, r338174, r338172

After long consultations with re@, core members and mmacy, revert
these changes. Followup changes will be made to mark them a

Revert drm2 removal.

Revert r338177, r338176, r338175, r338174, r338172

After long consultations with re@, core members and mmacy, revert
these changes. Followup changes will be made to mark them as
deprecated and prent a message about where to find the up-to-date
driver. Followup commits will be made to make this clear in the
installer. Followup commits to reduce POLA in ways we're still
exploring.

It's anticipated that after the freeze, this will be removed in
13-current (with the residual of the drm2 code copied to
sys/arm/dev/drm2 for the TEGRA port's use w/o the intel or
radeon drivers).

Due to the impending freeze, there was no formal core vote for
this. I've been talking to different core members all day, as well as
Matt Macey and Glen Barber. Nobody is completely happy, all are
grudgingly going along with this. Work is in progress to mitigate
the negative effects as much as possible.

Requested by: re@ (gjb, rgrimes)

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Merge sync of head

Merge from HEAD

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

Merge r278538 through r280226.

drm: Update the device-independent code to match Linux 3.8.13

This update brings few features:
o Support for the setmaster/dropmaster ioctls. For instance, they
are used to run multiple

drm: Update the device-independent code to match Linux 3.8.13

This update brings few features:
o Support for the setmaster/dropmaster ioctls. For instance, they
are used to run multiple X servers simultaneously.
o Support for minor devices. The only user-visible change is a new
entry in /dev/dri but it is useless at the moment. This is a
first step to support render nodes [1].

The main benefit is to greatly reduce the diff with Linux (at the
expense of an unreadable commit diff). Hopefully, next upgrades will be
easier.

No updates were made to the drivers, beside adapting them to API
changes.

[1] https://en.wikipedia.org/wiki/Direct_Rendering_Manager#Render_nodes

Tested by: Many people
MFC after: 1 month
Relnotes: yes

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IFC @253398

Merge fresh head.

sync from head

MFC @248093

drm: Fix a call to free(9) with an incorrect malloc type

While here, the call to free(9) is moved to drm_global.c, near the
initial malloc(9).

Reviewed by: Konstantin Belousov (kib@)

drm_global.c: Destroy sx in drm_global_release()

This fixes a build error at the same time (unused variable "item"), if
the kernel is compiled without INVARIANTS.

Reported by: Hartmann, O. <ohartma

drm_global.c: Destroy sx in drm_global_release()

This fixes a build error at the same time (unused variable "item"), if
the kernel is compiled without INVARIANTS.

Reported by: Hartmann, O. <ohartman@zedat.fu-berlin.de> (build error)
Reviewed by: Konstantin Belousov (kib@)

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Import the drm_global references helpers.

Sponsored by: The FreeBSD Foundation
MFC after: 1 month