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
Reviewed by: wulf
Differential Revision: https://reviews.freebsd.org/D46842
(cherry picked from commit 5c92f84bb607c692ce4fa762a7a3c4b86a2fa281)
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
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
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
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
- Add some new hlist macros.
- Update existing hlist macros removing the need for a temporary
iteration variable.
- Properly define the RCU hlist macros to be SMP safe with regard
to RCU.
- Safe list macro arguments by adding a pair of parentheses.
- Prefix the _list_add() and _list_splice() functions with "linux"
to reflect they are LinuxKPI internal functions.
Obtained from: Linux
MFC after: 1 week
Sponsored by: Mellanox Technologies
