[PATCH -next] fs: libfs: fix kernel-doc for mnt_userns

[Randy Dunlap]

Fix kernel-doc warning in libfs.c.

../fs/libfs.c:498: warning: Function parameter or member 'mnt_userns' not described in 'simple_setattr'

Fixes: 549c7297717c ("fs: make helpers idmap mount aware")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: linux-fsdevel@xxxxxxxxxxxxxxx
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
---
 fs/libfs.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210215.orig/fs/libfs.c
+++ linux-next-20210215/fs/libfs.c
@@ -481,6 +481,7 @@ EXPORT_SYMBOL(simple_rename);
 
 /**
  * simple_setattr - setattr for simple filesystem
+ * @mnt_userns: user namespace of the target mount
  * @dentry: dentry
  * @iattr: iattr structure
  *