Extern or forward variable declaration at include/linux/fs.h, line 1708 References: arch/m68k/emu/nfblock.c, line 94 arch/um/drivers/ubd_kern.c, line 110 arch/xtensa/platforms/iss/simdisk.c, line 145 block/genhd.c, line 1752 block/partition-generic.c, line 421 drivers/block/amiflop.c, line 1763 drivers/block/aoe/aoeblk.c, line 342 drivers/block/ataflop.c, line 1948 drivers/block/brd.c, line 325 drivers/block/DAC960.c, line 164 drivers/block/drbd/drbd_main.c, line 146 drivers/block/floppy.c, line 4202 drivers/block/loop.c, line 1680 drivers/block/mtip32xx/mtip32xx.c, line 3506 drivers/block/nbd.c, line 1381 drivers/block/null_blk_main.c, line 1422 drivers/block/paride/pcd.c, line 273 drivers/block/paride/pd.c, line 872 drivers/block/paride/pf.c, line 274 drivers/block/pktcdvd.c, line 2683 drivers/block/ps3disk.c, line 88 drivers/block/ps3vram.c, line 93 drivers/block/rbd.c, line 643 drivers/block/rsxx/dev.c, line 107 drivers/block/skd_main.c, line 357 drivers/block/skd_main.c, line 3119 drivers/block/sunvdc.c, line 165 drivers/block/swim.c, line 760 drivers/block/swim3.c, line 1053 drivers/block/sx8.c, line 428 drivers/block/umem.c, line 782 drivers/block/virtio_blk.c, line 352 drivers/block/xen-blkfront.c, line 123 drivers/block/xen-blkfront.c, line 2597 drivers/block/xsysace.c, line 967 drivers/block/z2ram.c, line 327 drivers/block/zram/zram_drv.c, line 1593 drivers/cdrom/gdrom.c, line 529 drivers/ide/ide-cd.c, line 1730 drivers/ide/ide-gd.c, line 342 drivers/ide/ide-tape.c, line 1935 drivers/lightnvm/core.c, line 249 drivers/md/bcache/super.c, line 647 drivers/md/dm.c, line 1841 drivers/md/dm.c, line 3172 drivers/md/md.c, line 193 drivers/md/md.c, line 7502 drivers/memstick/core/ms_block.c, line 2092 drivers/memstick/core/mspro_block.c, line 246 drivers/mmc/core/block.c, line 805 drivers/mtd/mtd_blkdevs.c, line 342 drivers/mtd/ubi/block.c, line 293 drivers/nvdimm/blk.c, line 233 drivers/nvdimm/btt.c, line 1510 drivers/nvdimm/pmem.c, line 241 drivers/nvme/host/core.c, line 1693 drivers/nvme/host/core.c, line 1719 drivers/nvme/host/nvme.h, line 436 drivers/s390/block/dasd.c, line 3290 drivers/s390/block/dasd_int.h, line 697 drivers/s390/block/dcssblk.c, line 42 drivers/s390/block/scm_blk.c, line 424 drivers/s390/block/xpram.c, line 250 drivers/scsi/sd.c, line 1783 drivers/scsi/sr.c, line 638 fs/block_dev.c, line 683 fs/block_dev.c, line 722 fs/block_dev.c, line 1416 include/linux/blkdev.h, line 1661 include/linux/fs.h, line 1708 include/linux/genhd.h, line 206