Extern or forward variable declaration at include/linux/blkdev.h, line 251 References: arch/m68k/atari/stram.c, line 1088 drivers/acorn/block/fd1772.c, line 1619 drivers/block/amiflop.c, line 1849 drivers/block/amiflop.c, line 1887 drivers/block/ataflop.c, line 2014 drivers/block/cpqarray.c, line 208 drivers/block/cpqarray.c, line 286 drivers/block/cpqarray.c, line 592 drivers/block/cpqarray.c, line 1990 drivers/block/cpqarray.c, line 2143 drivers/block/cpqarray.c, line 2153 drivers/block/cpqarray.c, line 2168 drivers/block/cpqarray.c, line 2426 drivers/block/cpqarray.c, line 2434 drivers/block/cpqarray.h, line 50 drivers/block/DAC960.c, line 2083 drivers/block/floppy.c, line 4205 drivers/block/ida_cmd.h, line 155 drivers/block/ida_cmd.h, line 206 drivers/block/ll_rw_blk.c, line 86 drivers/block/ll_rw_blk.c, line 1234 drivers/block/ll_rw_blk.c, line 1235 drivers/block/loop.c, line 161 drivers/block/loop.c, line 162 drivers/block/loop.c, line 1047 drivers/block/nbd.c, line 584 drivers/block/rd.c, line 414 drivers/block/rd.c, line 462 drivers/block/swim3.c, line 1075 drivers/block/swim_iop.c, line 152 drivers/block/umem.c, line 1430 drivers/block/umem.c, line 1467 drivers/block/xd.c, line 1120 drivers/block/z2ram.c, line 312 drivers/block/z2ram.c, line 369 drivers/char/raw.c, line 334 drivers/char/raw.c, line 335 drivers/ide/raid/ataraid.c, line 295 drivers/md/lvm.c, line 513 drivers/md/lvm.c, line 2950 drivers/md/md.c, line 290 drivers/md/md.c, line 291 drivers/md/md.c, line 1120 drivers/md/md.c, line 1121 drivers/md/md.c, line 3714 drivers/md/md.c, line 4102 drivers/message/i2o/i2o_block.c, line 1797 drivers/mtd/mtdblock_ro.c, line 282 drivers/mtd/mtdblock_ro.c, line 291 drivers/s390/block/dasd.c, line 780 drivers/s390/block/dasd.c, line 782 drivers/s390/block/dasd.c, line 784 drivers/s390/block/dasd.c, line 818 drivers/s390/block/dasd.c, line 837 drivers/s390/block/dasd.c, line 838 drivers/s390/block/dasd.c, line 896 drivers/s390/block/dasd.c, line 901 drivers/s390/block/dasd_fba.c, line 91 drivers/s390/block/dasd_fba.c, line 172 drivers/s390/block/dasd_fba.c, line 173 drivers/s390/block/dasd_fba.c, line 192 drivers/s390/char/tapeblock.c, line 76 drivers/s390/char/tapeblock.c, line 107 drivers/s390/char/tapeblock.c, line 108 drivers/s390/char/tapeblock.c, line 591 drivers/scsi/advansys.c, line 1653 drivers/scsi/sg.c, line 1778 drivers/scsi/sg.c, line 1781 drivers/scsi/sg.c, line 1783 drivers/scsi/sg.c, line 1784 drivers/scsi/sg.c, line 1786 drivers/scsi/sg.c, line 1788 drivers/scsi/sg.c, line 1789 drivers/scsi/sg.c, line 1791 drivers/scsi/sg.c, line 1794 drivers/scsi/sg.c, line 1797 drivers/scsi/sg.c, line 1799 drivers/scsi/sg.c, line 1825 drivers/scsi/sg.c, line 1851 drivers/scsi/sr.c, line 871 drivers/scsi/sr.c, line 984 drivers/usb/gadget/file_storage.c, line 3450 drivers/usb/gadget/file_storage.c, line 3451 fs/affs/super.c, line 32 fs/affs/super.c, line 265 fs/block_dev.c, line 30 fs/block_dev.c, line 32 fs/block_dev.c, line 50 fs/block_dev.c, line 52 fs/cramfs/inode.c, line 146 fs/cramfs/inode.c, line 147 fs/jfs/super.c, line 172 fs/jfs/super.c, line 173 fs/partitions/check.c, line 38 fs/partitions/check.c, line 391 fs/partitions/check.c, line 405 fs/reiserfs/super.c, line 1206 include/linux/blkdev.h, line 251 kernel/ksyms.c, line 327 mm/swapfile.c, line 951 mm/swapfile.c, line 952 mm/swapfile.c, line 955 mm/swapfile.c, line 956