diff --git a/[refs] b/[refs]
index 0ba0e21ff0c3..bf115d980cb6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bc6a6008e5e3c7a30191a7f19ab19e85b14b1705
+refs/heads/master: 939a9421eb53d3ea83188ae13802779041caefdb
diff --git a/trunk/fs/open.c b/trunk/fs/open.c
index dd98e8076024..40d1fa25f5aa 100644
--- a/trunk/fs/open.c
+++ b/trunk/fs/open.c
@@ -199,7 +199,7 @@ SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user
 int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 	struct file *filp)
 {
-	int err;
+	int ret;
 	struct iattr newattrs;
 
 	/* Not pretty: "inode->i_size" shouldn't really be signed. But it is. */
@@ -214,12 +214,14 @@ int do_truncate(struct dentry *dentry, loff_t length, unsigned int time_attrs,
 	}
 
 	/* Remove suid/sgid on truncate too */
-	newattrs.ia_valid |= should_remove_suid(dentry);
+	ret = should_remove_suid(dentry);
+	if (ret)
+		newattrs.ia_valid |= ret | ATTR_FORCE;
 
 	mutex_lock(&dentry->d_inode->i_mutex);
-	err = notify_change(dentry, &newattrs);
+	ret = notify_change(dentry, &newattrs);
 	mutex_unlock(&dentry->d_inode->i_mutex);
-	return err;
+	return ret;
 }
 
 static long do_sys_truncate(const char __user *pathname, loff_t length)