On Fri, Jan 22, 2021 at 06:33:40PM +0100, Christoph Hellwig wrote: > > /* > > * mount_setattr() > > @@ -127,9 +128,10 @@ struct mount_attr { > > __u64 attr_set; > > __u64 attr_clr; > > __u64 propagation; > > + __u64 userns_fd; > > }; > > > > /* List of all mount_attr versions. */ > > -#define MOUNT_ATTR_SIZE_VER0 24 /* sizeof first published struct */ > > +#define MOUNT_ATTR_SIZE_VER0 32 /* sizeof first published struct */ > > I think this hunk needs to go into the patch adding the structure. But except for that the patch looks fine: Reviewed-by: Christoph Hellwig <hch@xxxxxx>