Allways -> Always
:)
On Fri, Apr 16, 2021 at 9:04 AM Gedare Bloom <ged...@rtems.org> wrote:
> ok. also good if you want to open a ticket and backport to 5.
>
> On Fri, Apr 16, 2021 at 1:30 AM Sebastian Huber
> <sebastian.hu...@embedded-brains.de> wrote:
> >
> > Priority ceiling semaphores (in contrast to MrsP semaphores) have only
> > one priority ceiling which is defined for the home scheduler of the task
> > which created the semaphore. Always check during a semaphore seize that
> > the home scheduler of the calling task is equal to this scheduler.
> >
> > This avoids a scheduler mismatch if the semphore is acquired after the
> > calling thread blocked on the semaphore.
> > ---
> > cpukit/include/rtems/score/coremuteximpl.h | 20 ++++++++++----------
> > 1 file changed, 10 insertions(+), 10 deletions(-)
> >
> > diff --git a/cpukit/include/rtems/score/coremuteximpl.h
> b/cpukit/include/rtems/score/coremuteximpl.h
> > index cbc1e720fb..6b5c240105 100644
> > --- a/cpukit/include/rtems/score/coremuteximpl.h
> > +++ b/cpukit/include/rtems/score/coremuteximpl.h
> > @@ -475,19 +475,19 @@ RTEMS_INLINE_ROUTINE Status_Control
> _CORE_ceiling_mutex_Seize(
> >
> > _CORE_mutex_Acquire_critical( &the_mutex->Recursive.Mutex,
> queue_context );
> >
> > - owner = _CORE_mutex_Get_owner( &the_mutex->Recursive.Mutex );
> > -
> > - if ( owner == NULL ) {
> > #if defined(RTEMS_SMP)
> > - if (
> > - _Thread_Scheduler_get_home( executing )
> > - != _CORE_ceiling_mutex_Get_scheduler( the_mutex )
> > - ) {
> > - _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context );
> > - return STATUS_NOT_DEFINED;
> > - }
> > + if (
> > + _Thread_Scheduler_get_home( executing )
> > + != _CORE_ceiling_mutex_Get_scheduler( the_mutex )
> > + ) {
> > + _CORE_mutex_Release( &the_mutex->Recursive.Mutex, queue_context );
> > + return STATUS_NOT_DEFINED;
> > + }
> > #endif
> >
> > + owner = _CORE_mutex_Get_owner( &the_mutex->Recursive.Mutex );
> > +
> > + if ( owner == NULL ) {
> > _Thread_queue_Context_clear_priority_updates( queue_context );
> > return _CORE_ceiling_mutex_Set_owner(
> > the_mutex,
> > --
> > 2.26.2
> >
> > _______________________________________________
> > devel mailing list
> > devel@rtems.org
> > http://lists.rtems.org/mailman/listinfo/devel
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>
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