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-rw-r--r--kernel/locking/mcs_spinlock.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/locking/mcs_spinlock.c b/kernel/locking/mcs_spinlock.c
index 32fc16c..be9ee15 100644
--- a/kernel/locking/mcs_spinlock.c
+++ b/kernel/locking/mcs_spinlock.c
@@ -182,8 +182,7 @@ unqueue:
void osq_unlock(struct optimistic_spin_queue *lock)
{
- struct optimistic_spin_node *node = this_cpu_ptr(&osq_node);
- struct optimistic_spin_node *next;
+ struct optimistic_spin_node *node, *next;
int curr = encode_cpu(smp_processor_id());
/*
@@ -195,6 +194,7 @@ void osq_unlock(struct optimistic_spin_queue *lock)
/*
* Second most likely case.
*/
+ node = this_cpu_ptr(&osq_node);
next = xchg(&node->next, NULL);
if (next) {
ACCESS_ONCE(next->locked) = 1;
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