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 <manf...@colorfullife.com>
---
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
