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Diffstat (limited to 'storage/xtradb/include/sync0sync.ic')
| -rw-r--r-- | storage/xtradb/include/sync0sync.ic | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/storage/xtradb/include/sync0sync.ic b/storage/xtradb/include/sync0sync.ic index 83f28bfeded..fb24c0ec244 100644 --- a/storage/xtradb/include/sync0sync.ic +++ b/storage/xtradb/include/sync0sync.ic @@ -181,6 +181,11 @@ mutex_exit_func( to wake up possible hanging threads if they are missed in mutex_signal_object. */ + /* We add a memory barrier to prevent reading of the + number of waiters before releasing the lock. */ + + os_mb; + if (mutex_get_waiters(mutex) != 0) { mutex_signal_object(mutex); |