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-rw-r--r--ipc/sem.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ipc/sem.c b/ipc/sem.c
index 19af028a3e3..6a16f8edf2b 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -381,6 +381,7 @@ static void update_queue (struct sem_array * sma)
/* hands-off: q will disappear immediately after
* writing q->status.
*/
+ smb_wmb();
q->status = error;
q = n;
} else {
@@ -461,6 +462,7 @@ static void freeary (struct sem_array *sma, int id)
n = q->next;
q->status = IN_WAKEUP;
wake_up_process(q->sleeper); /* doesn't sleep */
+ smp_wmb();
q->status = -EIDRM; /* hands-off q */
q = n;
}