alloc_uid        1717 include/linux/sched.h extern struct user_struct * alloc_uid(struct user_namespace *, uid_t);
alloc_uid         556 kernel/sys.c   	new_user = alloc_uid(current->nsproxy->user_ns, new_ruid);
alloc_uid          34 kernel/user_namespace.c 	ns->root_user = alloc_uid(ns, 0);
alloc_uid          41 kernel/user_namespace.c 	new_user = alloc_uid(ns, current->uid);