Extern or forward variable declaration at include/linux/fs.h, line 51 References: arch/m68k/emu/nfblock.c, line 83 arch/um/drivers/ubd_kern.c, line 107 arch/um/drivers/ubd_kern.c, line 1417 block/ioctl.c, line 498 block/ioctl.c, line 501 block/ioctl.c, line 535 block/partitions/ibm.c, line 30 block/partitions/ibm.c, line 48 block/partitions/ibm.c, line 65 block/partitions/ibm.c, line 133 block/partitions/ibm.c, line 195 block/partitions/ibm.c, line 242 block/partitions/ibm.c, line 295 block/partitions/ibm.c, line 311 drivers/block/amiflop.c, line 1525 drivers/block/aoe/aoe.h, line 175 drivers/block/aoe/aoeblk.c, line 285 drivers/block/floppy.c, line 3409 drivers/block/mtip32xx/mtip32xx.c, line 3322 drivers/block/paride/pd.c, line 806 drivers/block/paride/pf.c, line 213 drivers/block/paride/pf.c, line 354 drivers/block/rsxx/dev.c, line 71 drivers/block/skd_main.c, line 3088 drivers/block/sunvdc.c, line 123 drivers/block/swim.c, line 713 drivers/block/sx8.c, line 404 drivers/block/sx8.c, line 430 drivers/block/umem.c, line 763 drivers/block/virtio_blk.c, line 352 drivers/block/xen-blkfront.c, line 486 drivers/block/xsysace.c, line 950 drivers/ide/ide-gd.c, line 276 drivers/md/dm-core.h, line 102 drivers/md/dm-ioctl.c, line 962 drivers/md/dm.c, line 437 drivers/md/dm.c, line 888 drivers/md/dm.c, line 898 drivers/md/md.c, line 7385 drivers/memstick/core/ms_block.c, line 1990 drivers/memstick/core/mspro_block.c, line 231 drivers/mmc/core/block.c, line 339 drivers/mtd/ftl.c, line 942 drivers/mtd/mtd_blkdevs.c, line 281 drivers/mtd/nftlcore.c, line 767 drivers/mtd/ubi/block.c, line 275 drivers/nvdimm/btt.c, line 1502 drivers/nvme/host/core.c, line 1675 drivers/s390/block/dasd.c, line 3370 drivers/s390/block/dasd_diag.c, line 475 drivers/s390/block/dasd_eckd.c, line 2387 drivers/s390/block/dasd_fba.c, line 215 drivers/s390/block/dasd_int.h, line 354 drivers/s390/block/xpram.c, line 233 drivers/scsi/sd.c, line 1429 include/linux/blkdev.h, line 1697 include/linux/device-mapper.h, line 459 include/linux/device-mapper.h, line 460 include/linux/fs.h, line 51