Use bus_generic_detach to detach and delete child devices during detach

This is simpler and more robust than individual calls to
device_delete_child.

Differential Revision: https://reviews.freebsd.

Use bus_generic_detach to detach and delete child devices during detach

This is simpler and more robust than individual calls to
device_delete_child.

Differential Revision: https://reviews.freebsd.org/D47972

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Replace calls to bus_generic_attach with bus_attach_children

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D47675

mlx(4): Stop checking for failures from malloc(M_WAITOK)

MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D45852

newbus: globally replace device_add_child(..., -1) with DEVICE_UNIT_ANY

Sponsored by: Netflix

sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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mlx: Remove unused devclass arguments to DRIVER_MODULE.

mlx: Use devclass_find to lookup the devclass for mlxd.

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D34994

Create wrapper for Giant taken for newbus

Create a wrapper for newbus to take giant and for busses to take it too.
bus_topo_lock() should be called before interacting with newbus routines
and unlock

Create wrapper for Giant taken for newbus

Create a wrapper for newbus to take giant and for busses to take it too.
bus_topo_lock() should be called before interacting with newbus routines
and unlocked with bus_topo_unlock(). If you need the topology lock for
some reason, bus_topo_mtx() will provide that.

Sponsored by: Netflix
Reviewed by: mav
Differential Revision: https://reviews.freebsd.org/D31831

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sysbeep: Adjust interface to take a duration as a sbt

Change the 'period' argument to 'duration' and change its type to
sbintime_t so we can more easily express different durations.

Reviewed by: ts

sysbeep: Adjust interface to take a duration as a sbt

Change the 'period' argument to 'duration' and change its type to
sbintime_t so we can more easily express different durations.

Reviewed by: tsoome, glebius
Differential Revision: https://reviews.freebsd.org/D32619

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sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error

sys/dev: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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Merge ^/head r313644 through r313895.

Remove references to EISA support in mlx. The driver never supported
the EISA cards and EISA bus support is being removed.

sys/dev: extend use of the howmany() macro when available.

We have a howmany() macro in the <sys/param.h> header that is
convenient to re-use as it makes things easier to read.

sys/dev: use our nitems() macro when it is avaliable through param.h.

No functional change, only trivial cases are done in this sweep,
Drivers that can get further enhancements will be done independ

sys/dev: use our nitems() macro when it is avaliable through param.h.

No functional change, only trivial cases are done in this sweep,
Drivers that can get further enhancements will be done independently.

Discussed in: freebsd-current

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Catch up with HEAD (r280229-r284686).

Merge sync of head

Merge from HEAD

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

Remove MAXBSIZE use from drivers where it has nothing to do.

In some cases limits are just not needed, in others -- DFLTPHYS is the
right constant to use instead.

MFC after: 1 month

IFC @r269962

Submitted by: Anish Gupta (akgupt3@gmail.com)

Merge head from 7/28

Sync to HEAD@r269943.

Add missing calls to bus_dmamap_unload() when freeing static DMA
allocations.

Reviewed by: scottl

Merge fresh head.