Extern or forward variable declaration at include/linux/fs.h, line 1597 References: arch/m68k/emu/nfblock.c, line 94 arch/powerpc/sysdev/axonram.c, line 156 arch/um/drivers/ubd_kern.c, line 97 arch/xtensa/platforms/iss/simdisk.c, line 145 block/genhd.c, line 1598 block/partition-generic.c, line 381 drivers/block/amiflop.c, line 1693 drivers/block/aoe/aoeblk.c, line 340 drivers/block/ataflop.c, line 1902 drivers/block/brd.c, line 437 drivers/block/cciss.c, line 230 drivers/block/cpqarray.c, line 198 drivers/block/DAC960.c, line 163 drivers/block/drbd/drbd_main.c, line 144 drivers/block/floppy.c, line 3885 drivers/block/hd.c, line 693 drivers/block/loop.c, line 1586 drivers/block/mg_disk.c, line 779 drivers/block/mtip32xx/mtip32xx.c, line 3605 drivers/block/nbd.c, line 826 drivers/block/null_blk.c, line 580 drivers/block/osdblk.c, line 129 drivers/block/paride/pcd.c, line 268 drivers/block/paride/pd.c, line 822 drivers/block/paride/pf.c, line 271 drivers/block/pktcdvd.c, line 2706 drivers/block/ps3disk.c, line 87 drivers/block/ps3vram.c, line 93 drivers/block/rbd.c, line 640 drivers/block/rsxx/dev.c, line 107 drivers/block/skd_main.c, line 453 drivers/block/skd_main.c, line 4757 drivers/block/sunvdc.c, line 157 drivers/block/swim.c, line 767 drivers/block/swim3.c, line 1085 drivers/block/sx8.c, line 426 drivers/block/umem.c, line 785 drivers/block/virtio_blk.c, line 299 drivers/block/xen-blkfront.c, line 119 drivers/block/xen-blkfront.c, line 2635 drivers/block/xsysace.c, line 951 drivers/block/z2ram.c, line 325 drivers/block/zram/zram_drv.c, line 1141 drivers/cdrom/gdrom.c, line 531 drivers/ide/ide-cd.c, line 1711 drivers/ide/ide-gd.c, line 342 drivers/ide/ide-tape.c, line 1946 drivers/lightnvm/core.c, line 618 drivers/lightnvm/rrpc.c, line 513 drivers/md/bcache/super.c, line 644 drivers/md/dm.c, line 2216 drivers/md/dm.c, line 3677 drivers/md/md.c, line 157 drivers/md/md.c, line 7081 drivers/memstick/core/ms_block.c, line 2097 drivers/memstick/core/mspro_block.c, line 246 drivers/mmc/card/block.c, line 719 drivers/mtd/mtd_blkdevs.c, line 311 drivers/mtd/ubi/block.c, line 291 drivers/nvdimm/blk.c, line 235 drivers/nvdimm/btt.c, line 1224 drivers/nvdimm/pmem.c, line 151 drivers/nvme/host/core.c, line 727 drivers/s390/block/dasd.c, line 3162 drivers/s390/block/dasd_int.h, line 657 drivers/s390/block/dcssblk.c, line 39 drivers/s390/block/scm_blk.c, line 468 drivers/s390/block/xpram.c, line 249 drivers/sbus/char/jsflash.c, line 456 drivers/scsi/sd.c, line 1647 drivers/scsi/sr.c, line 608 drivers/staging/lustre/lustre/llite/lloop.c, line 653 fs/block_dev.c, line 397 fs/block_dev.c, line 436 fs/block_dev.c, line 473 fs/block_dev.c, line 1125 include/linux/blkdev.h, line 1650 include/linux/fs.h, line 1597 include/linux/genhd.h, line 202