wrappers for ->i_mutex access

parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 27c6046..f84f8d0 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -95,7 +95,7 @@
 	if (IS_ERR(dentry))
 		return (void *)dentry; /* returning an error */
 	inode = path.dentry->d_inode;
-	mutex_unlock(&inode->i_mutex);
+	inode_unlock(inode);
 
 	audit_mark = kzalloc(sizeof(*audit_mark), GFP_KERNEL);
 	if (unlikely(!audit_mark)) {