1 files changed, 9 insertions, 2 deletions

diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index ad0e3335c481..93bec48f09ed 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -684,9 +684,16 @@ __mutex_unlock_common_slowpath(struct mutex *lock, int nested)
         unsigned long flags;
 
         /*
-         * some architectures leave the lock unlocked in the fastpath failure
+         * As a performance measurement, release the lock before doing other
+         * wakeup related duties to follow. This allows other tasks to acquire
+         * the lock sooner, while still handling cleanups in past unlock calls.
+         * This can be done as we do not enforce strict equivalence between the
+         * mutex counter and wait_list.
+         *
+         *
+         * Some architectures leave the lock unlocked in the fastpath failure
          * case, others need to leave it locked. In the later case we have to
-         * unlock it here
+         * unlock it here - as the lock counter is currently 0 or negative.
          */
         if (__mutex_slowpath_needs_to_unlock())
                 atomic_set(&lock->count, 1);