Extern or forward variable declaration at include/net/tcp.h, line 1200 References: drivers/block/drbd/drbd_int.h, line 858 drivers/block/drbd/drbd_int.h, line 859 drivers/block/drbd/drbd_int.h, line 860 drivers/block/drbd/drbd_int.h, line 861 drivers/block/drbd/drbd_int.h, line 862 drivers/block/drbd/drbd_int.h, line 1519 drivers/block/drbd/drbd_int.h, line 1520 drivers/block/drbd/drbd_nl.c, line 1967 drivers/block/drbd/drbd_nl.c, line 1968 drivers/block/drbd/drbd_nl.c, line 1969 drivers/block/drbd/drbd_nl.c, line 1970 drivers/block/drbd/drbd_nl.c, line 1974 drivers/block/drbd/drbd_receiver.c, line 3118 drivers/block/drbd/drbd_receiver.c, line 3266 drivers/block/drbd/drbd_receiver.c, line 3269 drivers/block/drbd/drbd_receiver.c, line 3326 drivers/block/drbd/drbd_receiver.c, line 3327 drivers/block/drbd/drbd_worker.c, line 284 drivers/block/drbd/drbd_worker.c, line 312 drivers/target/iscsi/iscsi_target_auth.c, line 150 include/net/tcp.h, line 1200 net/ipv4/tcp.c, line 2941