LinuxKPI: add DEFINE_LOCK_GUARD_0 for rcu

This adds guard support for non-real-types like rcu locking meaning
that we need to keep the lock state separately ourselves. _T is still
special and needs

LinuxKPI: add DEFINE_LOCK_GUARD_0 for rcu

This adds guard support for non-real-types like rcu locking meaning
that we need to keep the lock state separately ourselves. _T is still
special and needs to be updated. Given it may not be used it needs
an __unused attribute (we are using the LinuxKPI __maybe_unused which
indeed is more expressive in this case).

Sponsored by: The FreeBSD Foundation (initially)
MFC after: 3 days
Reviewed by: dumbbell
Differential Revision: https://reviews.freebsd.org/D52076

show more ...

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

show more ...

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

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

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 rcu_dereference_check()

Add a define for rcu_dereference_check() to rcu_dereference_protected()
which ignores the check argument. Our lockdep compat implementation
for use cases found

LinuxKPI: add rcu_dereference_check()

Add a define for rcu_dereference_check() to rcu_dereference_protected()
which ignores the check argument. Our lockdep compat implementation
for use cases found in iwlwifi would return 1 anyway.

Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30436

show more ...

linuxkpi: Implement rcu_replace_pointer() macro

This is needed for the drm-kmod 5.5 update.

Reviewed by: hselasky (src)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D30025

linuxkpi: Add rcu_swap_protected

This macros swap an rcu pointer with a normal pointer.
The condition only seems to be used for debug/warning under linux, ignore
for now.

Sponsored-by: The FreeBSD

linuxkpi: Add rcu_swap_protected

This macros swap an rcu pointer with a normal pointer.
The condition only seems to be used for debug/warning under linux, ignore
for now.

Sponsored-by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D24954

show more ...

Clone the RCU interface into a sleepable and a non-sleepable part
in the LinuxKPI.

This allows synchronize RCU to be used inside a SRCU read section.
No functional change intended.

Bump the __FreeB

Clone the RCU interface into a sleepable and a non-sleepable part
in the LinuxKPI.

This allows synchronize RCU to be used inside a SRCU read section.
No functional change intended.

Bump the __FreeBSD_version to force recompilation of external kernel modules.

PR: 242272
MFC after: 1 week
Sponsored by: Mellanox Technologies

show more ...

MFHead@r345275

Define some RCU debug macros in the LinuxKPI.

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

LinuxKPI: add DEFINE_LOCK_GUARD_0 for rcu

This adds guard support for non-real-types like rcu locking meaning
that we need to keep the lock state separately ourselves. _T is still
special and needs

LinuxKPI: add DEFINE_LOCK_GUARD_0 for rcu

This adds guard support for non-real-types like rcu locking meaning
that we need to keep the lock state separately ourselves. _T is still
special and needs to be updated. Given it may not be used it needs
an __unused attribute (we are using the LinuxKPI __maybe_unused which
indeed is more expressive in this case).

Sponsored by: The FreeBSD Foundation (initially)
MFC after: 3 days
Reviewed by: dumbbell
Differential Revision: https://reviews.freebsd.org/D52076

show more ...

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

show more ...

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

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

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 rcu_dereference_check()

Add a define for rcu_dereference_check() to rcu_dereference_protected()
which ignores the check argument. Our lockdep compat implementation
for use cases found

LinuxKPI: add rcu_dereference_check()

Add a define for rcu_dereference_check() to rcu_dereference_protected()
which ignores the check argument. Our lockdep compat implementation
for use cases found in iwlwifi would return 1 anyway.

Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30436

show more ...

linuxkpi: Implement rcu_replace_pointer() macro

This is needed for the drm-kmod 5.5 update.

Reviewed by: hselasky (src)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D30025

linuxkpi: Add rcu_swap_protected

This macros swap an rcu pointer with a normal pointer.
The condition only seems to be used for debug/warning under linux, ignore
for now.

Sponsored-by: The FreeBSD

linuxkpi: Add rcu_swap_protected

This macros swap an rcu pointer with a normal pointer.
The condition only seems to be used for debug/warning under linux, ignore
for now.

Sponsored-by: The FreeBSD Foundation
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D24954

show more ...

Clone the RCU interface into a sleepable and a non-sleepable part
in the LinuxKPI.

This allows synchronize RCU to be used inside a SRCU read section.
No functional change intended.

Bump the __FreeB

Clone the RCU interface into a sleepable and a non-sleepable part
in the LinuxKPI.

This allows synchronize RCU to be used inside a SRCU read section.
No functional change intended.

Bump the __FreeBSD_version to force recompilation of external kernel modules.

PR: 242272
MFC after: 1 week
Sponsored by: Mellanox Technologies

show more ...

MFHead@r345275

Define some RCU debug macros in the LinuxKPI.

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

Implement the rcu_dereference_raw() function macro.
Make sure all RCU dereferencing use the READ_ONCE() function macro.

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

Implement the rcu_dereference_raw() function macro.
Make sure all RCU dereferencing use the READ_ONCE() function macro.

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

show more ...

Merge ^/head r316992 through r317215.

Use __typeof() instead of typeof() in some RCU related macros in the LinuxKPI.

MFC after: 1 week
Sponsored by: Mellanox Technologies

Merge ^/head r313896 through r314128.

Replace dummy implementation of RCU in the LinuxKPI with one based on
the in-kernel concurrency kit's ck_epoch API. Factor RCU hlist_xxx()
functions into own rculist.h header file.

Obtained from: k

Replace dummy implementation of RCU in the LinuxKPI with one based on
the in-kernel concurrency kit's ck_epoch API. Factor RCU hlist_xxx()
functions into own rculist.h header file.

Obtained from: kmacy @
MFC after: 1 week
Sponsored by: Mellanox Technologies

show more ...