1 files changed, 11 insertions, 6 deletions

diff --git a/fs/inode.c b/fs/inode.c
index e193cd592fa8..901bad1e5f12 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -675,12 +675,17 @@ void unlock_new_inode(struct inode *inode)
         if (inode->i_mode & S_IFDIR) {
                 struct file_system_type *type = inode->i_sb->s_type;
 
-                /*
-                 * ensure nobody is actually holding i_mutex
-                 */
-                mutex_destroy(&inode->i_mutex);
-                mutex_init(&inode->i_mutex);
-                lockdep_set_class(&inode->i_mutex, &type->i_mutex_dir_key);
+                /* Set new key only if filesystem hasn't already changed it */
+                if (!lockdep_match_class(&inode->i_mutex,
+                    &type->i_mutex_key)) {
+                        /*
+                         * ensure nobody is actually holding i_mutex
+                         */
+                        mutex_destroy(&inode->i_mutex);
+                        mutex_init(&inode->i_mutex);
+                        lockdep_set_class(&inode->i_mutex,
+                                          &type->i_mutex_dir_key);
+                }
         }
 #endif
         /*