LinuxKPI: Add DEFINE_DEBUGFS_ATTRIBUTE_SIGNED to linux/debugfs.h

Sponsored by: Serenity CyberSecurity, LLC
MFC after: 1 week
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D456

LinuxKPI: Add DEFINE_DEBUGFS_ATTRIBUTE_SIGNED to linux/debugfs.h

Sponsored by: Serenity CyberSecurity, LLC
MFC after: 1 week
Reviewed by: manu
Differential Revision: https://reviews.freebsd.org/D45615

(cherry picked from commit 8c5c572125665e3fd8a033d1a8b0a370e5a43e24)

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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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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linuxkpi: Define `debugfs_initialized()`

It always return true on FreeBSD, at least for now, because all DRM
drivers using it depend on lindebugfs.

Reviewed by: manu
Approved by: manu

lindebugfs: Add `debugfs_create_file_size()`

This is the same as `debugfs_create_file()` but takes the initial size
of the file. In FreeBSD, the given size is ignored and
`debugfs_create_file()` is

lindebugfs: Add `debugfs_create_file_size()`

This is the same as `debugfs_create_file()` but takes the initial size
of the file. In FreeBSD, the given size is ignored and
`debugfs_create_file()` is called.

Reviewed by: emaste, manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D37914

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lindebugfs: Add missing `debugfs_create_u*()` and `debugfs_create_x*()`

The `debugfs_create_x*()` variants are the same as their
`debugfs_create_u*()` equivalent, but they work with lowercase
hexade

lindebugfs: Add missing `debugfs_create_u*()` and `debugfs_create_x*()`

The `debugfs_create_x*()` variants are the same as their
`debugfs_create_u*()` equivalent, but they work with lowercase
hexadecimal.

While here, fix a few style(9) issues.

Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38087

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lindebugfs: Add `debugfs_create_atomic_t()`

Reviewed by: jfree
Approved by: jfree
Differential Revision: https://reviews.freebsd.org/D37915

LinuxKPI,lindebugfs: add u8 base type and blob support

Add debugfs_create_u8() based on other already present implementations.
Add a read-only implementation for debugfs_create_blob().

Both are nee

LinuxKPI,lindebugfs: add u8 base type and blob support

Add debugfs_create_u8() based on other already present implementations.
Add a read-only implementation for debugfs_create_blob().

Both are needed for iwlwifi debugfs support.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
OKed by: jfree (earlier version)
Differential Revision: https://reviews.freebsd.org/D37090

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linuxkpi: drm-kmod debugfs support

This diff extends LinuxKPI to support simple attribute files in debugfs.
These simple attributes are an essential component for compiling drm-kmod
with CONFIG_DEBU

linuxkpi: drm-kmod debugfs support

This diff extends LinuxKPI to support simple attribute files in debugfs.
These simple attributes are an essential component for compiling drm-kmod
with CONFIG_DEBUG_FS enabled.
This will allow for easier graphics driver debugging using
Intel's igt-gpu-tools.

Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D35883
Sponsored by: Google, Inc. (GSoC 2022)

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LinuxKPI: Constantly use _LINUXKPI_ prefix in include guards

MFC after: 1 week
Reviewed by: bz, emaste, hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33562

import linux debugfs support

Reviewed by: hps@
MFC after: 1 week
Sponsored by: iX Systems
Differential Revision: https://reviews.freebsd.org/D19258