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-v44 head: 6558c48b60a8ae06e86ad4193a8cc0cc56b3b32d commit: 7009ced73f927b12d46b1be4e6921921fcea4b42 [77/99] userns: Implement unshare of the user namespace config: x86_64-randconfig-x580 (attached as .config) All related error/warning messages: In file included from include/linux/init_task.h:11:0, from kernel/sched/core.c:73: include/linux/user_namespace.h: In function 'unshare_userns': include/linux/user_namespace.h:70:6: error: 'flags' undeclared (first use in this function) include/linux/user_namespace.h:70:6: note: each undeclared identifier is reported only once for each function it appears in vim +70 include/linux/user_namespace.h 67 static inline int unshare_userns(unsigned long unshare_flags, 68 struct cred **new_cred) 69 { > 70 if (flags & CLONE_NEWUSER) 71 return -EINVAL; 72 return 0; 73 } --- 0-DAY kernel build testing backend Open Source Technology Centre Fengguang Wu Intel Corporation