Extern or forward variable declaration at include/linux/futex.h, line 128 References: kernel/fork.c, line 278 kernel/fork.c, line 400 kernel/fork.c, line 408 kernel/fork.c, line 437 kernel/fork.c, line 445 kernel/fork.c, line 476 kernel/fork.c, line 478 kernel/fork.c, line 493 kernel/fork.c, line 506 kernel/fork.c, line 537 kernel/fork.c, line 539 kernel/fork.c, line 567 kernel/fork.c, line 621 kernel/fork.c, line 623 kernel/fork.c, line 679 kernel/fork.c, line 945 kernel/fork.c, line 1510 kernel/fork.c, line 1598 kernel/fork.c, line 1600 kernel/fork.c, line 1641