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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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Merge ^/head r356931 through r357118.

virtio_scsi: use max target ID plus one as the initiator ID

This bus does not really have a concept of the initiator ID, so use
a guaranteed dummy one that won't conflict with any real target.

This

virtio_scsi: use max target ID plus one as the initiator ID

This bus does not really have a concept of the initiator ID, so use
a guaranteed dummy one that won't conflict with any real target.

This change fixes a problem with virtio_scsi on GCE where disks get
sequential target IDs starting from one. If there are seven or more
disks, then a disk with the target ID of seven would not be discovered
by FreeBSD as that ID was reserved as the initiator ID -- see
scsi_scan_bus().

Discussed with: bryanv
MFC after: 2 weeks
Sponsored by: Panzura

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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 r233826 through r256722.

Merge from head

IFC @ r254014

IFC @253398

IFC @ r252763

Merge virtio changes from projects/virtio

Contains projects/virtio commits:

r245738:
virtio: Minor man page tweaks
r246060:
virtio: Cleanup feature description printing
r246306:
virtio:

Merge virtio changes from projects/virtio

Contains projects/virtio commits:

r245738:
virtio: Minor man page tweaks
r246060:
virtio: Cleanup feature description printing
r246306:
virtio: Remove old debugging flag
r247238:
virtio: Remove PRIx64 macros from format strings
r247239:
virtio: Constify some fields
r247240:
virtio: Minor code simplifications
r249962:
virtio: Update to my freebsd.org email address

MFC after: 1 month

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Convert VirtIO to use ithreads instead of taskqueues

Contains projects/virtio commits:

r245709:
Each VirtIO device was scheduling its own taskqueue(9) to do the
off-level interrupt handling

Convert VirtIO to use ithreads instead of taskqueues

Contains projects/virtio commits:

r245709:
Each VirtIO device was scheduling its own taskqueue(9) to do the
off-level interrupt handling. ithreads(9) is the more nature way
to do this. The primary motivation for this work to better support
network multiqueue.
r245710:
virtio: Change virtqueue intr handlers to return void
r245711:
virtio_blk: Remove interrupt taskqueue
r245721:
vtnet: Remove interrupt taskqueue
r245722:
virtio_scsi: Remove interrupt taskqueue
r245747:
vtnet: Remove taskqueue fields missed in r245721

MFC after: 1 month

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Merge fresh head.

MFC

IFC @ r242684

Sync from head

Virtio SCSI driver

Submitted by: Bryan Venteicher bryanv at daemoninthecloset dot org
Reviewed by: grehan