LinuxKPI: lockdep fix #includes

Add sys/sytm.h for __diagused which unbreaks compilation of
drm-kmod 5.10-lts on main.

Sponsored by: The FreeBSD Foundation
Reported by: Evgenii Khramtsov
PR: 2824

LinuxKPI: lockdep fix #includes

Add sys/sytm.h for __diagused which unbreaks compilation of
drm-kmod 5.10-lts on main.

Sponsored by: The FreeBSD Foundation
Reported by: Evgenii Khramtsov
PR: 282479
Fixes: 5c92f84bb607
MFC after: 3 days

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LinuxKPI: update rcu_dereference_*() and lockdep_is_held()

Update rcu_dereference_{check,protected}() to call the check and log
once if it fails and if the RCU debug sysctl is turned on.
Also add pr

LinuxKPI: update rcu_dereference_*() and lockdep_is_held()

Update rcu_dereference_{check,protected}() to call the check and log
once if it fails and if the RCU debug sysctl is turned on.
Also add proper checks for conditions passed in to these functions.
For that implement linux_rcu_read_lock_held() (lots of help from wulf).

(While here also remove extraneous extern for function prototypes).

Update lockdep_is_held() to always be an inline function with argument
annotation so that we do no longer have unused variables
in callers which only call lockdep_is_held().

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: wulf
Differential Revision: https://reviews.freebsd.org/D46842

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LinuxKPI: lockdep_assert: wrong 'cond' used in WARN_ON MACRO

'cond' in WARN_ON need be bracketed,
otherwise it is wrong for multiple conditions.

Reviewed by: wulf
MFC after: 1 week
Differential rev

LinuxKPI: lockdep_assert: wrong 'cond' used in WARN_ON MACRO

'cond' in WARN_ON need be bracketed,
otherwise it is wrong for multiple conditions.

Reviewed by: wulf
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D44604

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

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

linuxkpi: Define `lockdep_assert{,_once}()`

Reviewed by: manu
Approved by: manu
Differential Revision: https://reviews.freebsd.org/D38538

linuxkpi: Define `lockdep_assert_none_held_once()`

This is defined as a no-op even when INVARIANTS is defined. I admit I
don't know how to implement that in FreeBSD and didn't search
thoroughly.

Re

linuxkpi: Define `lockdep_assert_none_held_once()`

This is defined as a no-op even when INVARIANTS is defined. I admit I
don't know how to implement that in FreeBSD and didn't search
thoroughly.

Reviewed by: bz
Approved by: bz
Differential Revision: https://reviews.freebsd.org/D37911

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LinuxKPI: lockdep.h add lockdep_{,un}register_key()

Add NOPs for lockdep_{,un}register_key().

Sponsored by: The FreeBSD Foundation
MFC after: 7 days
Reviewed by: hselasky, emaste
Differential Revis

LinuxKPI: lockdep.h add lockdep_{,un}register_key()

Add NOPs for lockdep_{,un}register_key().

Sponsored by: The FreeBSD Foundation
MFC after: 7 days
Reviewed by: hselasky, emaste
Differential Revision: https://reviews.freebsd.org/D36658

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LinuxKPI: lockdep add lockdep_assert_not_held()

Add lockdep_assert_not_held() asserting LA_UNLOCKED as needed by a
driver.

MFC after: 3 days
Reviewed by: hselasky
Differential Revision: https://rev

LinuxKPI: lockdep add lockdep_assert_not_held()

Add lockdep_assert_not_held() asserting LA_UNLOCKED as needed by a
driver.

MFC after: 3 days
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D34232

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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

LinuxKPI: Add some typical header pollution

To reduce amount of drm-kmod patching

MFC after: 1 week
Reviewed by: hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33297

LinuxKPI: Make lockdep*_pin_lock macros useable for drm-kmod

Summary:
- Add dummy struct pin_cookie definition;
- Convert lockdep_pin_lock macro to function;
- Fix 'unused variable' compile-time err

LinuxKPI: Make lockdep*_pin_lock macros useable for drm-kmod

Summary:
- Add dummy struct pin_cookie definition;
- Convert lockdep_pin_lock macro to function;
- Fix 'unused variable' compile-time errors;

MFC after: 1 week
Reviewers: hselasky, manu
Differential Revision: https://reviews.freebsd.org/D33295

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linuxkpi: Add macros for might_lock_nested() and lockdep_(re/un/)pin_lock()

In Linux, these are macros to locks in the kernel for scheduling purposes.
But as with other macros in this header, we are

linuxkpi: Add macros for might_lock_nested() and lockdep_(re/un/)pin_lock()

In Linux, these are macros to locks in the kernel for scheduling purposes.
But as with other macros in this header, we aren't doing anything with them
so we are doing `do {} while (0)` for now.

This is needed by the drm-kmod 5.7 update.

Approved by: hselasky (src)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D30710

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LinuxKPI: add lockdep_map

Add stubs for struct lockdep_map and three accessor functions
used by iwlwifi.

Obtained-from: bz_iwlwifi
Sponsored-by: The FreeBSD Foundation
MFC-after: 2 weeks
Reviewed-b

LinuxKPI: add lockdep_map

Add stubs for struct lockdep_map and three accessor functions
used by iwlwifi.

Obtained-from: bz_iwlwifi
Sponsored-by: The FreeBSD Foundation
MFC-after: 2 weeks
Reviewed-by: hselasky, emaste
Differential Revision: https://reviews.freebsd.org/D29398

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LinuxKPI: upstream a collection of drm-kmod conflicting changes

The upcoming in-kernel implementations for LinuxKPI based on work on
iwlwifi (and other wireless drivers) conflicts in a few places wi

LinuxKPI: upstream a collection of drm-kmod conflicting changes

The upcoming in-kernel implementations for LinuxKPI based on work on
iwlwifi (and other wireless drivers) conflicts in a few places with
the drm-kmod graphics work outside the base system.

In order to transition smoothly extract the conflicting bits.
This included "unaligned" accessor functions, sg_pcopy_from_buffer(),
IS_*() macros (to be further restricted in the future), power management
bits (possibly no longer conflicting with DRM), and other minor changes.

Obtained-from: bz_iwlwifi
Sponsored-by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: kib, hselasky, manu, bdragon (looked at earlier versions)
Differential Revision: https://reviews.freebsd.org/D26598

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MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Fix r363565

lockdep.h needs sys/lock.h for LOCK_CLASS

Implement more lockdep macros in the LinuxKPI.

Submitted by: ashafer_badland.io (Austin Shafer)
MFC after: 1 week
Sponsored by: Mellanox Technologies

Fix build with DRM and INVARIANTS enabled.

The DRM drivers use the lockdep assertion macros with spinlock_t locks
which are backed by mutexes, not sx locks. This causes compile
failures since you c

Fix build with DRM and INVARIANTS enabled.

The DRM drivers use the lockdep assertion macros with spinlock_t locks
which are backed by mutexes, not sx locks. This causes compile
failures since you can't use sx_assert with a mutex. Instead, change
the lockdep macros to use lock_class methods. This works by assuming
that each LinuxKPI locking primitive embeds a FreeBSD lock as its
first structure and uses a cast to get to the underlying 'struct
lock_object'.

Reviewed by: hselasky
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D20992

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Implement more lockdep stubs in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies
Sponsored by: Limelight Networks

Stub more lockdep function macros in the LinuxKPI.

MFC after: 1 week
Submitted by: Johannes Lundberg <johalun0@gmail.com>
Sponsored by: Mellanox Technologies

MFH @ r323558.

MFhead@r322870

Add some miscellaneous definitions to support the DRM drivers.

MFC after: 1 week

MFhead@r320180

Merge ^/head r319973 through 321382.