[GIT PULL] rv changes for v7.4 (for-next)

[Gabriele Monaco]

Steve,

The following changes since commit fd73f4a6659897191fa0d40695fe370925dd3780:

  Linux 7.3-rc3 (2026-09-13 14:38:02 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/gmonaco/linux.git rv-7.4-next

for you to fetch changes up to 5e9bdf2924c9041ff1520b528db6104626e9ef41:

  rv/rtapp/wakeup: Use "rv_this" the rv_monitor variable (2026-10-01 13:59:46 +0200)

----------------------------------------------------------------
rv changes for v7.4 (for-next)

Summary of changes:

- Improve lockdep annotation for reactors

  Reactors are not supposed to take locks, so they fit the LD_WAIT_FREE
  lockdep class. However, reactors may run in preemptible context and
  if the preempting code (tick or simply the scheduler) takes locks, we
  see a lockdep splat. Switch to LD_WAIT_SPIN to avoid the splat while
  documenting that reactors should still not take locks.

- Add KUnit tests for reactors

  Add KUnit test cases to validate registration and reaction, this
  requires exporting some symbols and other minor fixes.

- Use the right rv_this variable in the wakeup monitor

  LTL monitors were updated to use the generic rv_this static variable
  but this change wasn't propagated to the newly introduced wakeup
  monitor. This broke reactors for the monitor: update the it.

----------------------------------------------------------------
Nam Cao (1):
      rv/rtapp/wakeup: Use "rv_this" the rv_monitor variable

Wen Yang (4):
      rv: Use LD_WAIT_SPIN as the reactor lockdep wait type
      rv: Propagate rv_register_reactor() error from reactor init
      rv: Export rv_register_reactor() and rv_unregister_reactor()
      rv: Add KUnit tests for reactor registration and dispatch

 kernel/trace/rv/Kconfig                  |  12 ++++
 kernel/trace/rv/Makefile                 |   1 +
 kernel/trace/rv/monitors/wakeup/wakeup.c |   6 +-
 kernel/trace/rv/reactor_panic.c          |   3 +-
 kernel/trace/rv/reactor_printk.c         |   3 +-
 kernel/trace/rv/rv_reactors.c            |  12 +++-
 kernel/trace/rv/rv_reactors_kunit.c      | 111 +++++++++++++++++++++++++++++++
 7 files changed, 140 insertions(+), 8 deletions(-)
 create mode 100644 kernel/trace/rv/rv_reactors_kunit.c

To: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Nam Cao <namcao@xxxxxxxxxxxxx>
Cc: Wen Yang <wen.yang@xxxxxxxxx>