1 files changed, 4 insertions, 0 deletions

diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index e4d997bb7d70..11b103d87b27 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -820,6 +820,10 @@ static inline int __mutex_trylock_slowpath(atomic_t *lock_count)
         unsigned long flags;
         int prev;
 
+        /* No need to trylock if the mutex is locked. */
+        if (mutex_is_locked(lock))
+                return 0;
+
         spin_lock_mutex(&lock->wait_lock, flags);
 
         prev = atomic_xchg(&lock->count, -1);