Extern or forward variable declaration include/linux/fs.h, line 446 [usage...] include/linux/sched.h, line 802 [usage...] include/linux/swap.h, line 498 [usage...] include/linux/writeback.h, line 31 [usage...] Structure include/linux/backing-dev.h, line 64 [usage...] Class, struct, or union member fs/ceph/super.h, line 103 [usage...] include/linux/blkdev.h, line 409 [usage...] include/linux/fs.h, line 464 [usage...] include/linux/mtd/mtd.h, line 239 [usage...] include/linux/nfs_fs_sb.h, line 135 [usage...] include/linux/sched.h, line 1610 [usage...]