[PATCH 9/7] ipc/sem.c: Remove another memory barrier.

[Manfred Spraul]

As spin_unlock_wait() is defined as equivalent to spin_lock();
spin_unlock(), the memory barrier before spin_unlock_wait()
is not required.

Signed-off-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
---
 ipc/sem.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/ipc/sem.c b/ipc/sem.c
index a5da82c..2bef9c0 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -280,11 +280,7 @@ static void complexmode_enter(struct sem_array *sma)
 		return;
 	}
 
-	/* We need a full barrier after seting complex_mode:
-	 * The write to complex_mode must be visible
-	 * before we read the first sem->lock spinlock state.
-	 */
-	smp_store_mb(sma->complex_mode, true);
+	sma->complex_mode = true;
 
 	for (i = 0; i < sma->sem_nsems; i++) {
 		sem = sma->sem_base + i;
-- 
2.7.4