Extern or forward variable declaration at include/linux/futex.h, line 8 References: kernel/fork.c, line 258 kernel/fork.c, line 377 kernel/fork.c, line 385 kernel/fork.c, line 402 kernel/fork.c, line 434 kernel/fork.c, line 436 kernel/fork.c, line 451 kernel/fork.c, line 464 kernel/fork.c, line 492 kernel/fork.c, line 494 kernel/fork.c, line 522 kernel/fork.c, line 570 kernel/fork.c, line 572 kernel/fork.c, line 623 kernel/fork.c, line 914 kernel/fork.c, line 1472 kernel/fork.c, line 1554 kernel/fork.c, line 1556 kernel/fork.c, line 1597