Extern or forward variable declaration at include/trace/events/btrfs.h, line 12 References: fs/btrfs/backref.c, line 305 fs/btrfs/backref.c, line 374 fs/btrfs/backref.c, line 465 fs/btrfs/backref.c, line 654 fs/btrfs/backref.c, line 759 fs/btrfs/backref.c, line 848 fs/btrfs/backref.c, line 1060 fs/btrfs/backref.c, line 1102 fs/btrfs/backref.c, line 1313 fs/btrfs/backref.c, line 1520 fs/btrfs/backref.c, line 1581 fs/btrfs/ctree.c, line 42 fs/btrfs/ctree.c, line 336 fs/btrfs/ctree.c, line 341 fs/btrfs/ctree.c, line 346 fs/btrfs/ctree.c, line 351 fs/btrfs/ctree.c, line 361 fs/btrfs/ctree.c, line 381 fs/btrfs/ctree.c, line 402 fs/btrfs/ctree.c, line 420 fs/btrfs/ctree.c, line 481 fs/btrfs/ctree.c, line 522 fs/btrfs/ctree.c, line 540 fs/btrfs/ctree.c, line 576 fs/btrfs/ctree.c, line 604 fs/btrfs/ctree.c, line 679 fs/btrfs/ctree.c, line 700 fs/btrfs/ctree.c, line 771 fs/btrfs/ctree.c, line 819 fs/btrfs/ctree.c, line 831 fs/btrfs/ctree.c, line 837 fs/btrfs/ctree.c, line 908 fs/btrfs/ctree.c, 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line 3382 fs/btrfs/extent_io.c, line 3489 fs/btrfs/extent_io.c, line 3544 fs/btrfs/extent_io.c, line 4377 fs/btrfs/extent_io.c, line 4519 fs/btrfs/extent_io.c, line 4537 fs/btrfs/extent_io.c, line 4668 fs/btrfs/file.c, line 223 fs/btrfs/file.c, line 263 fs/btrfs/file.c, line 288 fs/btrfs/file.c, line 365 fs/btrfs/free-space-cache.c, line 778 fs/btrfs/free-space-cache.c, line 2650 fs/btrfs/free-space-cache.c, line 2929 fs/btrfs/inode-map.c, line 32 fs/btrfs/inode.c, line 2026 fs/btrfs/inode.c, line 2146 fs/btrfs/inode.c, line 2204 fs/btrfs/inode.c, line 2851 fs/btrfs/inode.c, line 2868 fs/btrfs/inode.c, line 3143 fs/btrfs/inode.c, line 8510 fs/btrfs/ioctl.c, line 341 fs/btrfs/ioctl.c, line 1944 fs/btrfs/ioctl.c, line 2022 fs/btrfs/ioctl.c, line 3875 fs/btrfs/ioctl.c, line 3905 fs/btrfs/ioctl.c, line 4061 fs/btrfs/ordered-data.c, line 68 fs/btrfs/ordered-data.c, line 616 fs/btrfs/qgroup.c, line 102 fs/btrfs/qgroup.c, line 104 fs/btrfs/qgroup.c, line 107 fs/btrfs/qgroup.c, line 126 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