Documentation/locking/locktypes.rst

125 PREEMPT_RT does not change the semaphore implementation because counting
150  Because an rw_semaphore writer cannot grant its priority to multiple
152  thus starving even high-priority writers.  In contrast, because readers
274    to RUNNING, but that does not work here because the task must remain
313  - Because an rwlock_t writer cannot grant its priority to multiple
315    thus starving even high-priority writers.  In contrast, because readers
338 On a PREEMPT_RT kernel this code sequence breaks because local_lock_irq()
372 because local_lock_irqsave() does not disable interrupts due to the
412 On PREEMPT_RT kernel this code sequence breaks because RT-mutex requires a
429 not allow to acquire p->lock because get_cpu_ptr() implicitly disables
454 This breaks because migrate_disable() does not protect against reentrancy from
482 But this code fails on PREEMPT_RT kernels because the memory allocator is
485 while holding normal non-raw spinlocks because they do not disable
495 PREEMPT_RT cannot substitute bit spinlocks because a single bit is too