Merge tag 'sched-urgent-2026-05-09' of git://git.kernel.org/pub/scm/linux/kernel...

Merge tag 'sched-urgent-2026-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:

 - Fix spurious failures in rseq self-tests (Mark Brown)

 - Fix rseq rseq::cpu_id_start ABI regression due to TCMalloc's creative
   use of the supposedly read-only field

   The fix is to introduce a new ABI variant based on a new (larger)
   rseq area registration size, to keep the TCMalloc use of rseq
   backwards compatible on new kernels (Thomas Gleixner)

 - Fix wakeup_preempt_fair() for not waking up task (Vincent Guittot)

 - Fix s64 mult overflow in vruntime_eligible() (Zhan Xusheng)

* tag 'sched-urgent-2026-05-09' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Fix wakeup_preempt_fair() for not waking up task
  sched/fair: Fix overflow in vruntime_eligible()
  selftests/rseq: Expand for optimized RSEQ ABI v2
  rseq: Reenable performance optimizations conditionally
  rseq: Implement read only ABI enforcement for optimized RSEQ V2 mode
  selftests/rseq: Validate legacy behavior
  selftests/rseq: Make registration flexible for legacy and optimized mode
  selftests/rseq: Skip tests if time slice extensions are not available
  rseq: Revert to historical performance killing behaviour
  rseq: Don't advertise time slice extensions if disabled
  rseq: Protect rseq_reset() against interrupts
  rseq: Set rseq::cpu_id_start to 0 on unregistration
  selftests/rseq: Don't run tests with runner scripts outside of the scripts