37 	chan_t *channel = NULL;  in create_new_channel()
58 		return NULL;  in fd_to_channel()
70 	return (channel == NULL) ? -1 : (channel - fdset);  in channel_to_fd()
109 				return NULL;  in next()
132 	if (*dp == NULL) {  in get_device_index()
156 	if (channel != NULL) {  in channel_close()
171 	if ((channel == NULL) || (dst == NULL) || (src == NULL)) {  in buf_to_channel()
202 		if (channel == NULL) {  in mount_point_to_channel()
211 	return NULL;  in mount_point_to_channel()
223 		return NULL;  in attach()
240 		return NULL;  in devattach()
244 	if (channel == NULL) {  in devattach()
245 		return NULL;  in devattach()
266 	if (path == NULL) {  in path_to_channel()
267 		return NULL;  in path_to_channel()
272 		channel = clone(&slash_channel, NULL);  in path_to_channel()
277 		if (path_next == NULL) {  in path_to_channel()
293 		return NULL;  in path_to_channel()
296 	if (channel == NULL) {  in path_to_channel()
297 		return NULL;  in path_to_channel()
312 		if (mnt != NULL) {  in path_to_channel()
317 	if (path_next == NULL) {  in path_to_channel()
327 	return NULL;  in path_to_channel()
337 		return NULL;  in clone()
350 	if (channel == NULL) {  in devclone()
351 		return NULL;  in devclone()
354 	if (new_channel == NULL) {  in devclone()
356 		if (new_channel == NULL) {  in devclone()
357 			return NULL;  in devclone()
382 	if ((channel == NULL) || (name == NULL) || (gen == NULL)) {  in devwalk()
417 	if ((channel == NULL) || (dir == NULL) || (gen == NULL)) {  in dirread()
436 	if ((channel == NULL) || (dir == NULL) || (name == NULL)) {  in make_dir_entry()
462 	if ((channel == NULL) || (dir == NULL) || (tab == NULL) ||  in devgen()
480 	if (path == NULL) {  in open()
501 	if (channel == NULL) {  in close()
521 	if ((dirc == NULL) || (dir == NULL) || (gen == NULL)) {  in devstat()
526 	if (c == NULL) {  in devstat()
539 			if (mnt != NULL) {  in devstat()
569 	if ((path == NULL) || (dir == NULL)) {  in stat()
586 	if (p == NULL) {  in stat()
593 	if (channel == NULL) {  in stat()
612 	if (buf == NULL) {  in read()
617 	if (channel == NULL) {  in read()
637 	if (buf == NULL) {  in write()
642 	if (channel == NULL) {  in write()
662 	if (channel == NULL) {  in seek()
679 	return NULL;  in deverrmount()
731 	if (new == NULL) {  in add_mount_point()
736 	if (cn == NULL) {  in add_mount_point()
746 		if (mp->new == NULL) {  in add_mount_point()
774 	if (channel == NULL) {  in bind()
797 	if (channel == NULL) {  in mount()
802 	if (mount_point_chan == NULL) {  in mount()
837 	if (channel == NULL) {  in debugfs_init()
842 	if (cloned_channel == NULL) {  in debugfs_init()