sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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hwpmc: use kstack_contains()

This existing helper function is preferable to the hand-rolled
calculation of the kstack bounds.

Make some small style improvements while here. Notably, rename every
in

hwpmc: use kstack_contains()

This existing helper function is preferable to the hand-rolled
calculation of the kstack bounds.

Make some small style improvements while here. Notably, rename every
instance of "r", the return address, to "ra". Tidy the includes in the
affected files.

Reviewed by: jkoshy
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D39909

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Adjust function definition in hwpmc to avoid clang 15 warning

With clang 15, the following -Werror warning is produced:

sys/dev/hwpmc/hwpmc_arm64.c:530:21: error: a function declaration without

Adjust function definition in hwpmc to avoid clang 15 warning

With clang 15, the following -Werror warning is produced:

sys/dev/hwpmc/hwpmc_arm64.c:530:21: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes]
pmc_arm64_initialize()
^
void

This is because many of the functions are declared with a (void)
argument list, but defined with an empty argument list. Make the
definition match the declaration.

Sponsored by: The FreeBSD Foundation

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pmc_save_user_callchain: eliminate write only td variable

Sponsored by: Netflix

hwpmc: remove dangling references to hwpmc_xscale

Reported by: mjg

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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Fix arm stack frame walking support:
- Adjust stack offset for Clang
- Correctly fill registers for fake stack frame (soft PMC)

MFC after: 1 week
Sponsored by: Stormshield
Differential Revision: htt

Fix arm stack frame walking support:
- Adjust stack offset for Clang
- Correctly fill registers for fake stack frame (soft PMC)

MFC after: 1 week
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D7396

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Catch up with HEAD (r280229-r284686).

Merge sync of head

MFH: r280643-r281852

Sponsored by: The FreeBSD Foundation

Merge from HEAD

Rather than defining our own magic checks here use INKERNEL() for
the PMC_IN_KERNEL() macro definition.

Add missing macros to extract the return address (LR) from the trapframe.

Discussed with: and

Rather than defining our own magic checks here use INKERNEL() for
the PMC_IN_KERNEL() macro definition.

Add missing macros to extract the return address (LR) from the trapframe.

Discussed with: andrew
Obtained from: Cambridge/L41
Sponsored by: DARPA, AFRL
MFC after: 2 weeks

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Merge from HEAD

Merge ^/head r277804 through r277843.

Add ARMv7 performance monitoring counters.

Differential Revision: https://reviews.freebsd.org/D1687
Reviewed by: rpaulo
Sponsored by: DARPA, AFRL

Merge fresh head.

MFC @ r241285

IFC @ r242684

Sync from head

Remove all the checks on curthread != NULL with the exception of some MD
trap checks (eg. printtrap()).

Generally this check is not needed anymore, as there is not a legitimate
case where curthread

Remove all the checks on curthread != NULL with the exception of some MD
trap checks (eg. printtrap()).

Generally this check is not needed anymore, as there is not a legitimate
case where curthread != NULL, after pcpu 0 area has been properly
initialized.

Reviewed by: bde, jhb
MFC after: 1 week

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Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370