> /* > * 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.