diff options
Diffstat (limited to 'ipc/sem.c')
| -rw-r--r-- | ipc/sem.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ipc/sem.c b/ipc/sem.c index 87c2b641fd7b..3ee355461489 100644 --- a/ipc/sem.c +++ b/ipc/sem.c @@ -415,6 +415,11 @@ static void update_queue (struct sem_array * sma) struct sem_queue *n; /* + * make sure that the wakeup doesnt preempt + * _this_ cpu prematurely. (on preempt_rt) + */ + preempt_disable_rt(); + /* * Continue scanning. The next operation * that must be checked depends on the type of the * completed operation: @@ -450,6 +455,7 @@ static void update_queue (struct sem_array * sma) */ smp_wmb(); q->status = error; + preempt_enable_rt(); q = n; } else { q = list_entry(q->list.next, struct sem_queue, list); |