56 		struct pidmap *map, int off)  in mk_pid()  argument
58 	return (map - pid_ns->pidmap)*BITS_PER_PAGE + off;  in mk_pid()
61 #define find_next_offset(map, off)					\  argument
62 		find_next_zero_bit((map)->page, BITS_PER_PAGE, off)
108 	struct pidmap *map = upid->ns->pidmap + nr / BITS_PER_PAGE;  in free_pidmap()  local
111 	clear_bit(offset, map->page);  in free_pidmap()
112 	atomic_inc(&map->nr_free);  in free_pidmap()
157 	struct pidmap *map;  in alloc_pidmap()  local
163 	map = &pid_ns->pidmap[pid/BITS_PER_PAGE];  in alloc_pidmap()
171 		if (unlikely(!map->page)) {  in alloc_pidmap()
178 			if (!map->page) {  in alloc_pidmap()
179 				map->page = page;  in alloc_pidmap()
184 			if (unlikely(!map->page))  in alloc_pidmap()
187 		if (likely(atomic_read(&map->nr_free))) {  in alloc_pidmap()
189 				if (!test_and_set_bit(offset, map->page)) {  in alloc_pidmap()
190 					atomic_dec(&map->nr_free);  in alloc_pidmap()
194 				offset = find_next_offset(map, offset);  in alloc_pidmap()
197 				pid = mk_pid(pid_ns, map, offset);  in alloc_pidmap()
202 		if (map < &pid_ns->pidmap[(pid_max-1)/BITS_PER_PAGE]) {  in alloc_pidmap()
203 			++map;  in alloc_pidmap()
206 			map = &pid_ns->pidmap[0];  in alloc_pidmap()
211 		pid = mk_pid(pid_ns, map, offset);  in alloc_pidmap()
219 	struct pidmap *map, *end;  in next_pidmap()  local
225 	map = &pid_ns->pidmap[(last + 1)/BITS_PER_PAGE];  in next_pidmap()
227 	for (; map < end; map++, offset = 0) {  in next_pidmap()
228 		if (unlikely(!map->page))  in next_pidmap()
230 		offset = find_next_bit((map)->page, BITS_PER_PAGE, offset);  in next_pidmap()
232 			return mk_pid(pid_ns, map, offset);  in next_pidmap()