Extern or forward variable declaration fs/btrfs/extent_io.h, line 91 [usage...] fs/btrfs/extent_io.h, line 510 [usage...] include/trace/events/btrfs.h, line 14 [usage...] Structure fs/btrfs/btrfs_inode.h, line 48 [usage...] Local variable fs/btrfs/delayed-inode.c, line 76 [usage...] fs/btrfs/delayed-inode.c, line 132 [usage...] fs/btrfs/disk-io.c, line 4176 [usage...] fs/btrfs/ordered-data.c, line 603 [usage...]