87 struct child {  struct
93 static struct child clone_newns(int (*fn)(void *), void *args,  in clone_newns()  argument
97 	struct child ret;  in clone_newns()
121 	ksft_print_msg("New child: %d, fd: %d\n", ret.pid, ret.fd);  in clone_newns()
126 static inline void child_close(struct child *child)  in child_close()  argument
128 	close(child->fd);  in child_close()
131 static inline int child_join(struct child *child, struct error *err)  in child_join()  argument
135 	r = wait_for_pid(child->pid);  in child_join()
140 		error_set(err, r, "child %d reported: %d", child->pid, r);  in child_join()
142 	if (munmap(child->stack, CHILD_STACK_SIZE)) {  in child_join()
143 		error_set(err, -1, "munmap of child stack failed (errno %d)", errno);  in child_join()
151 static inline int child_join_close(struct child *child, struct error *err)  in child_join_close()  argument
153 	child_close(child);  in child_join_close()
154 	return child_join(child, err);  in child_join_close()
255 	struct child a, b;  in test_pidfd_fdinfo_nspid()
259 	/* Create a new child in a new pid and mount namespace */  in test_pidfd_fdinfo_nspid()
263 	/* Pass the pidfd representing the first child to the  in test_pidfd_fdinfo_nspid()
264 	 * second child, which will be in a sibling pid namespace,  in test_pidfd_fdinfo_nspid()
288 	struct child a;  in test_pidfd_dead_fdinfo()
292 	/* Create a new child in a new pid and mount namespace */  in test_pidfd_dead_fdinfo()