Hi Eric, FYI, kernel build failed on tree: git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git userns-always-map-user-v46 head: 271556925ff7981a48391295134f3245cf815bb6 commit: 148991415a3e6b6da4381ef2f7a896c3cce7b58a [78/99] vfs: Add setns support for the mount namespace config: sh-allnoconfig (attached as .config) All related error/warning messages: In file included from init/main.c:14:0: include/linux/proc_fs.h:233:13: warning: 'proc_ns_inode' defined but not used [-Wunused-function] -- In file included from include/linux/sunrpc/stats.h:12:0, from include/linux/sunrpc/clnt.h:21, from include/linux/nfs_fs.h:57, from init/do_mounts.c:30: include/linux/proc_fs.h:233:13: warning: 'proc_ns_inode' defined but not used [-Wunused-function] -- In file included from drivers/tty/tty_io.c:88:0: include/linux/proc_fs.h:233:13: warning: 'proc_ns_inode' defined but not used [-Wunused-function] .. vim +233 include/linux/proc_fs.h 230 return ERR_PTR(-EINVAL); 231 } 232 > 233 static bool proc_ns_inode(struct inode *inode) ^ missing inline 234 { 235 return false; 236 } --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation