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-rw-r--r--kernel/locking/osq_lock.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/kernel/locking/osq_lock.c b/kernel/locking/osq_lock.c
index 15955ce35c53..75a6f6133866 100644
--- a/kernel/locking/osq_lock.c
+++ b/kernel/locking/osq_lock.c
@@ -55,7 +55,6 @@ osq_wait_next(struct optimistic_spin_queue *lock,
struct optimistic_spin_node *node,
int old_cpu)
{
- struct optimistic_spin_node *next = NULL;
int curr = encode_cpu(smp_processor_id());
for (;;) {
@@ -66,7 +65,7 @@ osq_wait_next(struct optimistic_spin_queue *lock,
* will now observe @lock and will complete its
* unlock()/unqueue().
*/
- break;
+ return NULL;
}
/*
@@ -80,15 +79,15 @@ osq_wait_next(struct optimistic_spin_queue *lock,
* wait for a new @node->next from its Step-C.
*/
if (node->next) {
+ struct optimistic_spin_node *next;
+
next = xchg(&node->next, NULL);
if (next)
- break;
+ return next;
}
cpu_relax();
}
-
- return next;
}
bool osq_lock(struct optimistic_spin_queue *lock)