Extern or forward variable declaration at include/linux/blkdev.h, line 35 References: block/bfq-iosched.c, line 6323 block/bfq-iosched.c, line 6371 block/bfq-iosched.c, line 6530 block/bfq-iosched.c, line 6552 block/bfq-iosched.c, line 6564 block/bfq-iosched.c, line 6596 block/bfq-iosched.c, line 6616 block/bfq-iosched.c, line 6644 block/bfq-iosched.c, line 6667 block/bfq-iosched.c, line 6689 block/blk-mq-sched.c, line 91 block/blk-mq-sched.c, line 173 block/blk-mq-sched.c, line 327 block/blk-mq-sched.c, line 382 block/blk-mq-sched.c, line 417 block/blk-mq-sched.c, line 496 block/blk-mq-sched.c, line 566 block/blk-mq-sched.h, line 31 block/blk-mq-sched.h, line 48 block/blk-mq-sched.h, line 58 block/blk-mq-sched.h, line 67 block/blk-mq-sched.h, line 75 block/blk-mq.c, line 355 block/blk-mq.c, line 501 block/blk.h, line 190 block/blk.h, line 195 block/elevator.c, line 63 block/elevator.c, line 154 block/elevator.c, line 157 block/elevator.c, line 174 block/elevator.c, line 176 block/elevator.c, line 181 block/elevator.c, line 206 block/elevator.c, line 222 block/elevator.c, line 297 block/elevator.c, line 383 block/elevator.c, line 397 block/elevator.c, line 408 block/elevator.c, line 418 block/elevator.c, line 432 block/elevator.c, line 438 block/elevator.c, line 450 block/elevator.c, line 456 block/elevator.c, line 475 block/elevator.c, line 501 block/elevator.c, line 712 block/kyber-iosched.c, line 419 block/kyber-iosched.c, line 439 block/kyber-iosched.c, line 860 block/kyber-iosched.c, line 868 block/mq-deadline.c, line 403 block/mq-deadline.c, line 419 block/mq-deadline.c, line 606 block/mq-deadline.c, line 622 include/linux/blkdev.h, line 35 include/linux/blkdev.h, line 399