59 files changed, 93 insertions, 283 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 6894b085f0ee..620d93489539 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -335,7 +335,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
        }
        init_rwsem(&v9ses->rename_sem);
-        rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);
+        rc = bdi_setup_and_register(&v9ses->bdi, "9p");
        if (rc) {
                kfree(v9ses->aname);
                kfree(v9ses->uname);
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 2b607257820c..d142a2449e65 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -106,7 +106,7 @@ struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
        volume->cell            = params->cell;
        volume->vid             = vlocation->vldb.vid[params->type];
-        ret = bdi_setup_and_register(&volume->bdi, "afs", BDI_CAP_MAP_COPY);
+        ret = bdi_setup_and_register(&volume->bdi, "afs");
        if (ret)
                goto error_bdi;
diff --git a/fs/aio.c b/fs/aio.c
index c428871f1093..118a2e0088d8 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -165,15 +165,6 @@ static struct vfsmount *aio_mnt;
 static const struct file_operations aio_ring_fops;
 static const struct address_space_operations aio_ctx_aops;
-/* Backing dev info for aio fs.
- * -no dirty page accounting or writeback happens
- */
-static struct backing_dev_info aio_fs_backing_dev_info = {
-        .name           = "aiofs",
-        .state          = 0,
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK | BDI_CAP_MAP_COPY,
-};
 static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages)
 {
        struct qstr this = QSTR_INIT("[aio]", 5);
@@ -185,7 +176,6 @@ static struct file *aio_private_file(struct kioctx *ctx, loff_t nr_pages)
        inode->i_mapping->a_ops = &aio_ctx_aops;
        inode->i_mapping->private_data = ctx;
-        inode->i_mapping->backing_dev_info = &aio_fs_backing_dev_info;
        inode->i_size = PAGE_SIZE * nr_pages;
        path.dentry = d_alloc_pseudo(aio_mnt->mnt_sb, &this);
@@ -230,9 +220,6 @@ static int __init aio_setup(void)
        if (IS_ERR(aio_mnt))
                panic("Failed to create aio fs mount.");
-        if (bdi_init(&aio_fs_backing_dev_info))
-                panic("Failed to init aio fs backing dev info.");
        kiocb_cachep = KMEM_CACHE(kiocb, SLAB_HWCACHE_ALIGN|SLAB_PANIC);
        kioctx_cachep = KMEM_CACHE(kioctx,SLAB_HWCACHE_ALIGN|SLAB_PANIC);
diff --git a/fs/block_dev.c b/fs/block_dev.c
index b48c41bf0f86..a9f92794d7a0 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -49,23 +49,15 @@ inline struct block_device *I_BDEV(struct inode *inode)
 }
 EXPORT_SYMBOL(I_BDEV);
-/*
+static void bdev_write_inode(struct inode *inode)
- * Move the inode from its current bdi to a new bdi.  Make sure the inode
- * is clean before moving so that it doesn't linger on the old bdi.
- */
-static void bdev_inode_switch_bdi(struct inode *inode,
-                        struct backing_dev_info *dst)
 {
-        while (true) {
+        spin_lock(&inode->i_lock);
-                spin_lock(&inode->i_lock);
+        while (inode->i_state & I_DIRTY) {
-                if (!(inode->i_state & I_DIRTY)) {
-                        inode->i_data.backing_dev_info = dst;
-                        spin_unlock(&inode->i_lock);
-                        return;
-                }
                spin_unlock(&inode->i_lock);
                WARN_ON_ONCE(write_inode_now(inode, true));
+                spin_lock(&inode->i_lock);
        }
+        spin_unlock(&inode->i_lock);
 }
 /* Kill _all_ buffers and pagecache , dirty or not.. */
@@ -584,7 +576,6 @@ struct block_device *bdget(dev_t dev)
                inode->i_bdev = bdev;
                inode->i_data.a_ops = &def_blk_aops;
                mapping_set_gfp_mask(&inode->i_data, GFP_USER);
-                inode->i_data.backing_dev_info = &default_backing_dev_info;
                spin_lock(&bdev_lock);
                list_add(&bdev->bd_list, &all_bdevs);
                spin_unlock(&bdev_lock);
@@ -1145,8 +1136,6 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
                bdev->bd_queue = disk->queue;
                bdev->bd_contains = bdev;
                if (!partno) {
-                        struct backing_dev_info *bdi;
                        ret = -ENXIO;
                        bdev->bd_part = disk_get_part(disk, partno);
                        if (!bdev->bd_part)
@@ -1172,11 +1161,8 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
                                }
                        }
-                        if (!ret) {
+                        if (!ret)
                                bd_set_size(bdev,(loff_t)get_capacity(disk)<<9);
-                                bdi = blk_get_backing_dev_info(bdev);
-                                bdev_inode_switch_bdi(bdev->bd_inode, bdi);
-                        }
                        /*
                         * If the device is invalidated, rescan partition
@@ -1203,8 +1189,6 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
                        if (ret)
                                goto out_clear;
                        bdev->bd_contains = whole;
-                        bdev_inode_switch_bdi(bdev->bd_inode,
-                                whole->bd_inode->i_data.backing_dev_info);
                        bdev->bd_part = disk_get_part(disk, partno);
                        if (!(disk->flags & GENHD_FL_UP) ||
                            !bdev->bd_part || !bdev->bd_part->nr_sects) {
@@ -1244,7 +1228,6 @@ static int __blkdev_get(struct block_device *bdev, fmode_t mode, int for_part)
        bdev->bd_disk = NULL;
        bdev->bd_part = NULL;
        bdev->bd_queue = NULL;
-        bdev_inode_switch_bdi(bdev->bd_inode, &default_backing_dev_info);
        if (bdev != bdev->bd_contains)
                __blkdev_put(bdev->bd_contains, mode, 1);
        bdev->bd_contains = NULL;
@@ -1464,11 +1447,11 @@ static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
                WARN_ON_ONCE(bdev->bd_holders);
                sync_blockdev(bdev);
                kill_bdev(bdev);
-                /* ->release can cause the old bdi to disappear,
+                /*
-                 * so must switch it out first
+                 * ->release can cause the queue to disappear, so flush all
+                 * dirty data before.
                 */
-                bdev_inode_switch_bdi(bdev->bd_inode,
+                bdev_write_inode(bdev->bd_inode);
-                                        &default_backing_dev_info);
        }
        if (bdev->bd_contains == bdev) {
                if (disk->fops->release)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8c63419a7f70..1afb18226da8 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1715,12 +1715,11 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
 {
        int err;
-        bdi->capabilities = BDI_CAP_MAP_COPY;
+        err = bdi_setup_and_register(bdi, "btrfs");
-        err = bdi_setup_and_register(bdi, "btrfs", BDI_CAP_MAP_COPY);
        if (err)
                return err;
-        bdi->ra_pages   = default_backing_dev_info.ra_pages;
+        bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE;
        bdi->congested_fn       = btrfs_congested_fn;
        bdi->congested_data     = info;
        return 0;
@@ -2319,7 +2318,6 @@ int open_ctree(struct super_block *sb,
         */
        fs_info->btree_inode->i_size = OFFSET_MAX;
        fs_info->btree_inode->i_mapping->a_ops = &btree_aops;
-        fs_info->btree_inode->i_mapping->backing_dev_info = &fs_info->bdi;
        RB_CLEAR_NODE(&BTRFS_I(fs_info->btree_inode)->rb_node);
        extent_io_tree_init(&BTRFS_I(fs_info->btree_inode)->io_tree,
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index a606ab551296..b78bbbac900d 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1746,7 +1746,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
        mutex_lock(&inode->i_mutex);
-        current->backing_dev_info = inode->i_mapping->backing_dev_info;
+        current->backing_dev_info = inode_to_bdi(inode);
        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
        if (err) {
                mutex_unlock(&inode->i_mutex);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8bf326affb94..54bcf639d1cf 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3608,7 +3608,6 @@ cache_acl:
        switch (inode->i_mode & S_IFMT) {
        case S_IFREG:
                inode->i_mapping->a_ops = &btrfs_aops;
-                inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
                BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
                inode->i_fop = &btrfs_file_operations;
                inode->i_op = &btrfs_file_inode_operations;
@@ -3623,7 +3622,6 @@ cache_acl:
        case S_IFLNK:
                inode->i_op = &btrfs_symlink_inode_operations;
                inode->i_mapping->a_ops = &btrfs_symlink_aops;
-                inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
                break;
        default:
                inode->i_op = &btrfs_special_inode_operations;
@@ -6088,7 +6086,6 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
        inode->i_fop = &btrfs_file_operations;
        inode->i_op = &btrfs_file_inode_operations;
        inode->i_mapping->a_ops = &btrfs_aops;
-        inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
        err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name);
        if (err)
@@ -9203,7 +9200,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
        inode->i_fop = &btrfs_file_operations;
        inode->i_op = &btrfs_file_inode_operations;
        inode->i_mapping->a_ops = &btrfs_aops;
-        inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
        BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
        err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name);
@@ -9247,7 +9243,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
        inode->i_op = &btrfs_symlink_inode_operations;
        inode->i_mapping->a_ops = &btrfs_symlink_aops;
-        inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
        inode_set_bytes(inode, name_len);
        btrfs_i_size_write(inode, name_len);
        err = btrfs_update_inode(trans, root, inode);
@@ -9459,7 +9454,6 @@ static int btrfs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
        inode->i_op = &btrfs_file_inode_operations;
        inode->i_mapping->a_ops = &btrfs_aops;
-        inode->i_mapping->backing_dev_info = &root->fs_info->bdi;
        BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
        ret = btrfs_init_inode_security(trans, inode, dir, NULL);
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index ce74b394b49d..905986dd4c3c 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -945,7 +945,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
        mutex_lock(&inode->i_mutex);
        /* We can write back this queue in page reclaim */
-        current->backing_dev_info = file->f_mapping->backing_dev_info;
+        current->backing_dev_info = inode_to_bdi(inode);
        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
        if (err)
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index f61a74115beb..6b5173605154 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -783,8 +783,6 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
        }
        inode->i_mapping->a_ops = &ceph_aops;
-        inode->i_mapping->backing_dev_info =
-                &ceph_sb_to_client(inode->i_sb)->backing_dev_info;
        switch (inode->i_mode & S_IFMT) {
        case S_IFIFO:
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 50f06cddc94b..5ae62587a71d 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -40,17 +40,6 @@ static void ceph_put_super(struct super_block *s)
        dout("put_super\n");
        ceph_mdsc_close_sessions(fsc->mdsc);
-        /*
-         * ensure we release the bdi before put_anon_super releases
-         * the device name.
-         */
-        if (s->s_bdi == &fsc->backing_dev_info) {
-                bdi_unregister(&fsc->backing_dev_info);
-                s->s_bdi = NULL;
-        }
-        return;
 }
 static int ceph_statfs(struct dentry *dentry, struct kstatfs *buf)
@@ -910,7 +899,7 @@ static int ceph_register_bdi(struct super_block *sb,
                        >> PAGE_SHIFT;
        else
                fsc->backing_dev_info.ra_pages =
-                        default_backing_dev_info.ra_pages;
+                        VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE;
        err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%ld",
                           atomic_long_inc_return(&bdi_seq));
@@ -1002,11 +991,16 @@ out_final:
 static void ceph_kill_sb(struct super_block *s)
 {
        struct ceph_fs_client *fsc = ceph_sb_to_client(s);
+        dev_t dev = s->s_dev;
        dout("kill_sb %p\n", s);
        ceph_mdsc_pre_umount(fsc->mdsc);
-        kill_anon_super(s);    /* will call put_super after sb is r/o */
+        generic_shutdown_super(s);
        ceph_mdsc_destroy(fsc);
        destroy_fs_client(fsc);
+        free_anon_bdev(dev);
 }
 static struct file_system_type ceph_fs_type = {
diff --git a/fs/char_dev.c b/fs/char_dev.c
index 67b2007f10fe..ea06a3d0364c 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -24,27 +24,6 @@
 #include "internal.h"
-/*
- * capabilities for /dev/mem, /dev/kmem and similar directly mappable character
- * devices
- * - permits shared-mmap for read, write and/or exec
- * - does not permit private mmap in NOMMU mode (can't do COW)
- * - no readahead or I/O queue unplugging required
- */
-struct backing_dev_info directly_mappable_cdev_bdi = {
-        .name = "char",
-        .capabilities   = (
-#ifdef CONFIG_MMU
-                /* permit private copies of the data to be taken */
-                BDI_CAP_MAP_COPY |
-#endif
-                /* permit direct mmap, for read, write or exec */
-                BDI_CAP_MAP_DIRECT |
-                BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP |
-                /* no writeback happens */
-                BDI_CAP_NO_ACCT_AND_WRITEBACK),
-};
 static struct kobj_map *cdev_map;
 static DEFINE_MUTEX(chrdevs_lock);
@@ -575,8 +554,6 @@ static struct kobject *base_probe(dev_t dev, int *part, void *data)
 void __init chrdev_init(void)
 {
        cdev_map = kobj_map_init(base_probe, &chrdevs_lock);
-        if (bdi_init(&directly_mappable_cdev_bdi))
-                panic("Failed to init directly mappable cdev bdi");
 }
@@ -590,4 +567,3 @@ EXPORT_SYMBOL(cdev_del);
 EXPORT_SYMBOL(cdev_add);
 EXPORT_SYMBOL(__register_chrdev);
 EXPORT_SYMBOL(__unregister_chrdev);
-EXPORT_SYMBOL(directly_mappable_cdev_bdi);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2a772da16b83..d3aa999ab785 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -3446,7 +3446,7 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
        int referral_walks_count = 0;
 #endif
-        rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
+        rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs");
        if (rc)
                return rc;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 0c3ce464cae4..2d4f37235ed0 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -937,8 +937,6 @@ retry_iget5_locked:
                        inode->i_flags |= S_NOATIME | S_NOCMTIME;
                if (inode->i_state & I_NEW) {
                        inode->i_ino = hash;
-                        if (S_ISREG(inode->i_mode))
-                                inode->i_data.backing_dev_info = sb->s_bdi;
 #ifdef CONFIG_CIFS_FSCACHE
                        /* initialize per-inode cache cookie pointer */
                        CIFS_I(inode)->fscache = NULL;
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index b945410bfcd5..82ec68b59208 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -183,7 +183,7 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
                goto unlock_out;
        }
-        error = bdi_setup_and_register(&vc->bdi, "coda", BDI_CAP_MAP_COPY);
+        error = bdi_setup_and_register(&vc->bdi, "coda");
        if (error)
                goto unlock_out;
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index bd4a3c167091..a315677e44d3 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -70,8 +70,6 @@ extern int configfs_is_root(struct config_item *item);
 extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
 extern int configfs_create(struct dentry *, umode_t mode, int (*init)(struct inode *));
-extern int configfs_inode_init(void);
-extern void configfs_inode_exit(void);
 extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
 extern int configfs_make_dirent(struct configfs_dirent *,
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index 5946ad98053f..65af86147154 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -50,12 +50,6 @@ static const struct address_space_operations configfs_aops = {
        .write_end      = simple_write_end,
 };
-static struct backing_dev_info configfs_backing_dev_info = {
-        .name           = "configfs",
-        .ra_pages       = 0,    /* No readahead */
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
-};
 static const struct inode_operations configfs_inode_operations ={
        .setattr        = configfs_setattr,
 };
@@ -137,7 +131,6 @@ struct inode *configfs_new_inode(umode_t mode, struct configfs_dirent *sd,
        if (inode) {
                inode->i_ino = get_next_ino();
                inode->i_mapping->a_ops = &configfs_aops;
-                inode->i_mapping->backing_dev_info = &configfs_backing_dev_info;
                inode->i_op = &configfs_inode_operations;
                if (sd->s_iattr) {
@@ -283,13 +276,3 @@ void configfs_hash_and_remove(struct dentry * dir, const char * name)
        }
        mutex_unlock(&dir->d_inode->i_mutex);
 }
-int __init configfs_inode_init(void)
-{
-        return bdi_init(&configfs_backing_dev_info);
-}
-void configfs_inode_exit(void)
-{
-        bdi_destroy(&configfs_backing_dev_info);
-}
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index f6c285833390..da94e41bdbf6 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -145,19 +145,13 @@ static int __init configfs_init(void)
        if (!config_kobj)
                goto out2;
-        err = configfs_inode_init();
-        if (err)
-                goto out3;
        err = register_filesystem(&configfs_fs_type);
        if (err)
-                goto out4;
+                goto out3;
        return 0;
-out4:
-        pr_err("Unable to register filesystem!\n");
-        configfs_inode_exit();
 out3:
+        pr_err("Unable to register filesystem!\n");
        kobject_put(config_kobj);
 out2:
        kmem_cache_destroy(configfs_dir_cachep);
@@ -172,7 +166,6 @@ static void __exit configfs_exit(void)
        kobject_put(config_kobj);
        kmem_cache_destroy(configfs_dir_cachep);
        configfs_dir_cachep = NULL;
-        configfs_inode_exit();
 }
 MODULE_AUTHOR("Oracle");
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 1686dc2da9fd..34b36a504059 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -67,7 +67,6 @@ static int ecryptfs_inode_set(struct inode *inode, void *opaque)
        inode->i_ino = lower_inode->i_ino;
        inode->i_version++;
        inode->i_mapping->a_ops = &ecryptfs_aops;
-        inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi;
        if (S_ISLNK(inode->i_mode))
                inode->i_op = &ecryptfs_symlink_iops;
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index d9eb84bda559..1895d60f4122 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -520,7 +520,7 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
                goto out;
        }
-        rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs", BDI_CAP_MAP_COPY);
+        rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs");
        if (rc)
                goto out1;
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
index f1d3d4eb8c4f..6fc91df99ff8 100644
--- a/fs/exofs/inode.c
+++ b/fs/exofs/inode.c
@@ -1214,7 +1214,6 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
                memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
        }
-        inode->i_mapping->backing_dev_info = sb->s_bdi;
        if (S_ISREG(inode->i_mode)) {
                inode->i_op = &exofs_file_inode_operations;
                inode->i_fop = &exofs_file_operations;
@@ -1314,7 +1313,6 @@ struct inode *exofs_new_inode(struct inode *dir, umode_t mode)
        set_obj_2bcreated(oi);
-        inode->i_mapping->backing_dev_info = sb->s_bdi;
        inode_init_owner(inode, dir, mode);
        inode->i_ino = sbi->s_nextid++;
        inode->i_blkbits = EXOFS_BLKSHIFT;
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 95965503afcb..fcc2e565f540 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -836,7 +836,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
                goto free_sbi;
        }
-        ret = bdi_setup_and_register(&sbi->bdi, "exofs", BDI_CAP_MAP_COPY);
+        ret = bdi_setup_and_register(&sbi->bdi, "exofs");
        if (ret) {
                EXOFS_DBGMSG("Failed to bdi_setup_and_register\n");
                dput(sb->s_root);
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index 7d66fb0e4cca..6c14bb8322fa 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -170,7 +170,7 @@ static void ext2_preread_inode(struct inode *inode)
        struct ext2_group_desc * gdp;
        struct backing_dev_info *bdi;
-        bdi = inode->i_mapping->backing_dev_info;
+        bdi = inode_to_bdi(inode);
        if (bdi_read_congested(bdi))
                return;
        if (bdi_write_congested(bdi))
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index ac64edbe501d..64c39c7c594f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -334,7 +334,7 @@ static void save_error_info(struct super_block *sb, const char *func,
 static int block_device_ejected(struct super_block *sb)
 {
        struct inode *bd_inode = sb->s_bdev->bd_inode;
-        struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info;
+        struct backing_dev_info *bdi = inode_to_bdi(bd_inode);
        return bdi->dev == NULL;
 }
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 2d609a5fbfea..c399152de397 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -66,15 +66,21 @@ int writeback_in_progress(struct backing_dev_info *bdi)
 }
 EXPORT_SYMBOL(writeback_in_progress);
-static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
+struct backing_dev_info *inode_to_bdi(struct inode *inode)
 {
-        struct super_block *sb = inode->i_sb;
+        struct super_block *sb;
-        if (sb_is_blkdev_sb(sb))
+        if (!inode)
-                return inode->i_mapping->backing_dev_info;
+                return &noop_backing_dev_info;
+        sb = inode->i_sb;
+#ifdef CONFIG_BLOCK
+        if (sb_is_blkdev_sb(sb))
+                return blk_get_backing_dev_info(I_BDEV(inode));
+#endif
        return sb->s_bdi;
 }
+EXPORT_SYMBOL_GPL(inode_to_bdi);
 static inline struct inode *wb_inode(struct list_head *head)
 {
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d769e594855b..c01ec3bdcfd8 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1159,7 +1159,7 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
        mutex_lock(&inode->i_mutex);
        /* We can write back this queue in page reclaim */
-        current->backing_dev_info = mapping->backing_dev_info;
+        current->backing_dev_info = inode_to_bdi(inode);
        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
        if (err)
@@ -1464,7 +1464,7 @@ static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req)
 {
        struct inode *inode = req->inode;
        struct fuse_inode *fi = get_fuse_inode(inode);
-        struct backing_dev_info *bdi = inode->i_mapping->backing_dev_info;
+        struct backing_dev_info *bdi = inode_to_bdi(inode);
        int i;
        list_del(&req->writepages_entry);
@@ -1658,7 +1658,7 @@ static int fuse_writepage_locked(struct page *page)
        req->end = fuse_writepage_end;
        req->inode = inode;
-        inc_bdi_stat(mapping->backing_dev_info, BDI_WRITEBACK);
+        inc_bdi_stat(inode_to_bdi(inode), BDI_WRITEBACK);
        inc_zone_page_state(tmp_page, NR_WRITEBACK_TEMP);
        spin_lock(&fc->lock);
@@ -1768,7 +1768,7 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req,
        if (old_req->num_pages == 1 && (old_req->state == FUSE_REQ_INIT ||
                                        old_req->state == FUSE_REQ_PENDING)) {
-                struct backing_dev_info *bdi = page->mapping->backing_dev_info;
+                struct backing_dev_info *bdi = inode_to_bdi(page->mapping->host);
                copy_highpage(old_req->pages[0], page);
                spin_unlock(&fc->lock);
@@ -1872,7 +1872,7 @@ static int fuse_writepages_fill(struct page *page,
        req->page_descs[req->num_pages].offset = 0;
        req->page_descs[req->num_pages].length = PAGE_SIZE;
-        inc_bdi_stat(page->mapping->backing_dev_info, BDI_WRITEBACK);
+        inc_bdi_stat(inode_to_bdi(inode), BDI_WRITEBACK);
        inc_zone_page_state(tmp_page, NR_WRITEBACK_TEMP);
        err = 0;
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index f38256e4476e..e8799c11424b 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -308,7 +308,6 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
                if (!fc->writeback_cache || !S_ISREG(attr->mode))
                        inode->i_flags |= S_NOCMTIME;
                inode->i_generation = generation;
-                inode->i_data.backing_dev_info = &fc->bdi;
                fuse_init_inode(inode, attr);
                unlock_new_inode(inode);
        } else if ((inode->i_mode ^ attr->mode) & S_IFMT) {
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 805b37fed638..4ad4f94edebe 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -289,7 +289,7 @@ continue_unlock:
                if (!clear_page_dirty_for_io(page))
                        goto continue_unlock;
-                trace_wbc_writepage(wbc, mapping->backing_dev_info);
+                trace_wbc_writepage(wbc, inode_to_bdi(inode));
                ret = __gfs2_jdata_writepage(page, wbc);
                if (unlikely(ret)) {
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index aeb7bc958a18..f42dffba056a 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -768,7 +768,6 @@ int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number,
                mapping->flags = 0;
                mapping_set_gfp_mask(mapping, GFP_NOFS);
                mapping->private_data = NULL;
-                mapping->backing_dev_info = s->s_bdi;
                mapping->writeback_index = 0;
        }
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 8633ad328ee2..efc8e254787c 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -112,7 +112,6 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
        mapping->flags = 0;
        mapping_set_gfp_mask(mapping, GFP_NOFS);
        mapping->private_data = NULL;
-        mapping->backing_dev_info = sb->s_bdi;
        mapping->writeback_index = 0;
        spin_lock_init(&sdp->sd_log_lock);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 5b327f837de7..1666382b198d 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -743,7 +743,7 @@ static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
        struct gfs2_inode *ip = GFS2_I(inode);
        struct gfs2_sbd *sdp = GFS2_SB(inode);
        struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
-        struct backing_dev_info *bdi = metamapping->backing_dev_info;
+        struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
        int ret = 0;
        if (wbc->sync_mode == WB_SYNC_ALL)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 5eba47f593f8..c274aca8e8dc 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -62,12 +62,6 @@ static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
        return container_of(inode, struct hugetlbfs_inode_info, vfs_inode);
 }
-static struct backing_dev_info hugetlbfs_backing_dev_info = {
-        .name           = "hugetlbfs",
-        .ra_pages       = 0,    /* No readahead */
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
-};
 int sysctl_hugetlb_shm_group;
 enum {
@@ -498,7 +492,6 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
                lockdep_set_class(&inode->i_mapping->i_mmap_rwsem,
                                &hugetlbfs_i_mmap_rwsem_key);
                inode->i_mapping->a_ops = &hugetlbfs_aops;
-                inode->i_mapping->backing_dev_info =&hugetlbfs_backing_dev_info;
                inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                inode->i_mapping->private_data = resv_map;
                info = HUGETLBFS_I(inode);
@@ -1032,10 +1025,6 @@ static int __init init_hugetlbfs_fs(void)
                return -ENOTSUPP;
        }
-        error = bdi_init(&hugetlbfs_backing_dev_info);
-        if (error)
-                return error;
        error = -ENOMEM;
        hugetlbfs_inode_cachep = kmem_cache_create("hugetlbfs_inode_cache",
                                        sizeof(struct hugetlbfs_inode_info),
@@ -1071,7 +1060,6 @@ static int __init init_hugetlbfs_fs(void)
 out:
        kmem_cache_destroy(hugetlbfs_inode_cachep);
 out2:
-        bdi_destroy(&hugetlbfs_backing_dev_info);
        return error;
 }
@@ -1091,7 +1079,6 @@ static void __exit exit_hugetlbfs_fs(void)
        for_each_hstate(h)
                kern_unmount(hugetlbfs_vfsmount[i++]);
        unregister_filesystem(&hugetlbfs_fs_type);
-        bdi_destroy(&hugetlbfs_backing_dev_info);
 }
 module_init(init_hugetlbfs_fs)
diff --git a/fs/inode.c b/fs/inode.c
index 3a53b1da3fb8..b7871577571d 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -170,20 +170,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
        atomic_set(&mapping->i_mmap_writable, 0);
        mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
        mapping->private_data = NULL;
-        mapping->backing_dev_info = &default_backing_dev_info;
        mapping->writeback_index = 0;
-        /*
-         * If the block_device provides a backing_dev_info for client
-         * inodes then use that.  Otherwise the inode share the bdev's
-         * backing_dev_info.
-         */
-        if (sb->s_bdev) {
-                struct backing_dev_info *bdi;
-                bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
-                mapping->backing_dev_info = bdi;
-        }
        inode->i_private = NULL;
        inode->i_mapping = mapping;
        INIT_HLIST_HEAD(&inode->i_dentry);      /* buggered by rcu freeing */
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 985217626e66..9000874a945b 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -24,12 +24,6 @@ static const struct address_space_operations kernfs_aops = {
        .write_end      = simple_write_end,
 };
-static struct backing_dev_info kernfs_bdi = {
-        .name           = "kernfs",
-        .ra_pages       = 0,    /* No readahead */
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
-};
 static const struct inode_operations kernfs_iops = {
        .permission     = kernfs_iop_permission,
        .setattr        = kernfs_iop_setattr,
@@ -40,12 +34,6 @@ static const struct inode_operations kernfs_iops = {
        .listxattr      = kernfs_iop_listxattr,
 };
-void __init kernfs_inode_init(void)
-{
-        if (bdi_init(&kernfs_bdi))
-                panic("failed to init kernfs_bdi");
-}
 static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)
 {
        static DEFINE_MUTEX(iattr_mutex);
@@ -298,7 +286,6 @@ static void kernfs_init_inode(struct kernfs_node *kn, struct inode *inode)
        kernfs_get(kn);
        inode->i_private = kn;
        inode->i_mapping->a_ops = &kernfs_aops;
-        inode->i_mapping->backing_dev_info = &kernfs_bdi;
        inode->i_op = &kernfs_iops;
        set_default_inode_attr(inode, kn->mode);
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index dc84a3ef9ca2..af9fa7499919 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -88,7 +88,6 @@ int kernfs_iop_removexattr(struct dentry *dentry, const char *name);
 ssize_t kernfs_iop_getxattr(struct dentry *dentry, const char *name, void *buf,
                            size_t size);
 ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size);
-void kernfs_inode_init(void);
 /*
 * dir.c
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index f973ae9b05f1..8eaf417187f1 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -246,5 +246,4 @@ void __init kernfs_init(void)
        kernfs_node_cache = kmem_cache_create("kernfs_node_cache",
                                              sizeof(struct kernfs_node),
                                              0, SLAB_PANIC, NULL);
-        kernfs_inode_init();
 }
diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index e31e589369a4..01a9e16e9782 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -267,7 +267,6 @@ ncp_iget(struct super_block *sb, struct ncp_entry_info *info)
        if (inode) {
                atomic_set(&NCP_FINFO(inode)->opened, info->opened);
-                inode->i_mapping->backing_dev_info = sb->s_bdi;
                inode->i_ino = info->ino;
                ncp_set_attr(inode, info);
                if (S_ISREG(inode->i_mode)) {
@@ -560,7 +559,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
        server = NCP_SBP(sb);
        memset(server, 0, sizeof(*server));
-        error = bdi_setup_and_register(&server->bdi, "ncpfs", BDI_CAP_MAP_COPY);
+        error = bdi_setup_and_register(&server->bdi, "ncpfs");
        if (error)
                goto out_fput;
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index 3c9769441f36..7ae1c263c5cf 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -1002,7 +1002,7 @@ mds_commit:
        spin_unlock(cinfo->lock);
        if (!cinfo->dreq) {
                inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+                inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
                             BDI_RECLAIMABLE);
                __mark_inode_dirty(req->wb_context->dentry->d_inode,
                                   I_DIRTY_DATASYNC);
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index f29fb7d7e8f8..c22ecaa86c1c 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1366,7 +1366,7 @@ ff_layout_mark_request_commit(struct nfs_page *req,
        spin_unlock(cinfo->lock);
        if (!cinfo->dreq) {
                inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+                inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
                             BDI_RECLAIMABLE);
                __mark_inode_dirty(req->wb_context->dentry->d_inode,
                                   I_DIRTY_DATASYNC);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index d2398c193bda..e4f0dcef8f54 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -388,7 +388,6 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st
                if (S_ISREG(inode->i_mode)) {
                        inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
                        inode->i_data.a_ops = &nfs_file_aops;
-                        inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
                } else if (S_ISDIR(inode->i_mode)) {
                        inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
                        inode->i_fop = &nfs_dir_operations;
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 21469e6e3834..212b8c883d22 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -430,7 +430,6 @@ int  nfs_show_options(struct seq_file *, struct dentry *);
 int  nfs_show_devname(struct seq_file *, struct dentry *);
 int  nfs_show_path(struct seq_file *, struct dentry *);
 int  nfs_show_stats(struct seq_file *, struct dentry *);
-void nfs_put_super(struct super_block *);
 int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
 /* write.c */
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 48cea3c30e5d..75090feeafad 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -53,7 +53,6 @@ static const struct super_operations nfs4_sops = {
        .destroy_inode  = nfs_destroy_inode,
        .write_inode    = nfs4_write_inode,
        .drop_inode     = nfs_drop_inode,
-        .put_super      = nfs_put_super,
        .statfs         = nfs_statfs,
        .evict_inode    = nfs4_evict_inode,
        .umount_begin   = nfs_umount_begin,
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 368d9395d2e7..322b2de02988 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -311,7 +311,6 @@ const struct super_operations nfs_sops = {
        .destroy_inode  = nfs_destroy_inode,
        .write_inode    = nfs_write_inode,
        .drop_inode     = nfs_drop_inode,
-        .put_super      = nfs_put_super,
        .statfs         = nfs_statfs,
        .evict_inode    = nfs_evict_inode,
        .umount_begin   = nfs_umount_begin,
@@ -2572,7 +2571,7 @@ struct dentry *nfs_fs_mount_common(struct nfs_server *server,
                error = nfs_bdi_register(server);
                if (error) {
                        mntroot = ERR_PTR(error);
-                        goto error_splat_bdi;
+                        goto error_splat_super;
                }
                server->super = s;
        }
@@ -2604,9 +2603,6 @@ error_splat_root:
        dput(mntroot);
        mntroot = ERR_PTR(error);
 error_splat_super:
-        if (server && !s->s_root)
-                bdi_unregister(&server->backing_dev_info);
-error_splat_bdi:
        deactivate_locked_super(s);
        goto out;
 }
@@ -2654,27 +2650,19 @@ out:
 EXPORT_SYMBOL_GPL(nfs_fs_mount);
 /*
- * Ensure that we unregister the bdi before kill_anon_super
- * releases the device name
- */
-void nfs_put_super(struct super_block *s)
-{
-        struct nfs_server *server = NFS_SB(s);
-        bdi_unregister(&server->backing_dev_info);
-}
-EXPORT_SYMBOL_GPL(nfs_put_super);
-/*
 * Destroy an NFS2/3 superblock
 */
 void nfs_kill_super(struct super_block *s)
 {
        struct nfs_server *server = NFS_SB(s);
+        dev_t dev = s->s_dev;
+        generic_shutdown_super(s);
-        kill_anon_super(s);
        nfs_fscache_release_super_cookie(s);
        nfs_free_server(server);
+        free_anon_bdev(dev);
 }
 EXPORT_SYMBOL_GPL(nfs_kill_super);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index bcf83e535f29..88a6d2196ece 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -791,7 +791,7 @@ nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
        spin_unlock(cinfo->lock);
        if (!cinfo->dreq) {
                inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                inc_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+                inc_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
                             BDI_RECLAIMABLE);
                __mark_inode_dirty(req->wb_context->dentry->d_inode,
                                   I_DIRTY_DATASYNC);
@@ -858,7 +858,7 @@ static void
 nfs_clear_page_commit(struct page *page)
 {
        dec_zone_page_state(page, NR_UNSTABLE_NFS);
-        dec_bdi_stat(page_file_mapping(page)->backing_dev_info, BDI_RECLAIMABLE);
+        dec_bdi_stat(inode_to_bdi(page_file_mapping(page)->host), BDI_RECLAIMABLE);
 }
 /* Called holding inode (/cinfo) lock */
@@ -1607,7 +1607,7 @@ void nfs_retry_commit(struct list_head *page_list,
                nfs_mark_request_commit(req, lseg, cinfo, ds_commit_idx);
                if (!cinfo->dreq) {
                        dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
-                        dec_bdi_stat(page_file_mapping(req->wb_page)->backing_dev_info,
+                        dec_bdi_stat(inode_to_bdi(page_file_mapping(req->wb_page)->host),
                                     BDI_RECLAIMABLE);
                }
                nfs_unlock_and_release_request(req);
diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c
index 57ceaf33d177..748ca238915a 100644
--- a/fs/nilfs2/gcinode.c
+++ b/fs/nilfs2/gcinode.c
@@ -172,7 +172,6 @@ int nilfs_init_gcinode(struct inode *inode)
        inode->i_mode = S_IFREG;
        mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);
        inode->i_mapping->a_ops = &empty_aops;
-        inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi;
        ii->i_flags = 0;
        nilfs_bmap_init_gc(ii->i_bmap);
diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index c4dcd1db57ee..892cf5ffdb8e 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -429,7 +429,6 @@ int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz)
        inode->i_mode = S_IFREG;
        mapping_set_gfp_mask(inode->i_mapping, gfp_mask);
-        inode->i_mapping->backing_dev_info = inode->i_sb->s_bdi;
        inode->i_op = &def_mdt_iops;
        inode->i_fop = &def_mdt_fops;
@@ -457,13 +456,12 @@ int nilfs_mdt_setup_shadow_map(struct inode *inode,
                               struct nilfs_shadow_map *shadow)
 {
        struct nilfs_mdt_info *mi = NILFS_MDT(inode);
-        struct backing_dev_info *bdi = inode->i_sb->s_bdi;
        INIT_LIST_HEAD(&shadow->frozen_buffers);
        address_space_init_once(&shadow->frozen_data);
-        nilfs_mapping_init(&shadow->frozen_data, inode, bdi);
+        nilfs_mapping_init(&shadow->frozen_data, inode);
        address_space_init_once(&shadow->frozen_btnodes);
-        nilfs_mapping_init(&shadow->frozen_btnodes, inode, bdi);
+        nilfs_mapping_init(&shadow->frozen_btnodes, inode);
        mi->mi_shadow = shadow;
        return 0;
 }
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index da276640f776..700ecbcca55d 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -461,14 +461,12 @@ unsigned nilfs_page_count_clean_buffers(struct page *page,
        return nc;
 }
-void nilfs_mapping_init(struct address_space *mapping, struct inode *inode,
+void nilfs_mapping_init(struct address_space *mapping, struct inode *inode)
-                        struct backing_dev_info *bdi)
 {
        mapping->host = inode;
        mapping->flags = 0;
        mapping_set_gfp_mask(mapping, GFP_NOFS);
        mapping->private_data = NULL;
-        mapping->backing_dev_info = bdi;
        mapping->a_ops = &empty_aops;
 }
diff --git a/fs/nilfs2/page.h b/fs/nilfs2/page.h
index ef30c5c2426f..a43b8287d012 100644
--- a/fs/nilfs2/page.h
+++ b/fs/nilfs2/page.h
@@ -57,8 +57,7 @@ int nilfs_copy_dirty_pages(struct address_space *, struct address_space *);
 void nilfs_copy_back_pages(struct address_space *, struct address_space *);
 void nilfs_clear_dirty_page(struct page *, bool);
 void nilfs_clear_dirty_pages(struct address_space *, bool);
-void nilfs_mapping_init(struct address_space *mapping, struct inode *inode,
+void nilfs_mapping_init(struct address_space *mapping, struct inode *inode);
-                        struct backing_dev_info *bdi);
 unsigned nilfs_page_count_clean_buffers(struct page *, unsigned, unsigned);
 unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
                                            sector_t start_blk,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 2e5b3ec85b8f..5bc2a1cf73c3 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -166,7 +166,7 @@ struct inode *nilfs_alloc_inode(struct super_block *sb)
        ii->i_state = 0;
        ii->i_cno = 0;
        ii->vfs_inode.i_version = 1;
-        nilfs_mapping_init(&ii->i_btnode_cache, &ii->vfs_inode, sb->s_bdi);
+        nilfs_mapping_init(&ii->i_btnode_cache, &ii->vfs_inode);
        return &ii->vfs_inode;
 }
@@ -1057,7 +1057,6 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
 {
        struct the_nilfs *nilfs;
        struct nilfs_root *fsroot;
-        struct backing_dev_info *bdi;
        __u64 cno;
        int err;
@@ -1077,8 +1076,7 @@ nilfs_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_time_gran = 1;
        sb->s_max_links = NILFS_LINK_MAX;
-        bdi = sb->s_bdev->bd_inode->i_mapping->backing_dev_info;
+        sb->s_bdi = &bdev_get_queue(sb->s_bdev)->backing_dev_info;
-        sb->s_bdi = bdi ? : &default_backing_dev_info;
        err = load_nilfs(nilfs, sb);
        if (err)
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 643faa44f22b..1da9b2d184dc 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -19,6 +19,7 @@
 * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
+#include <linux/backing-dev.h>
 #include <linux/buffer_head.h>
 #include <linux/gfp.h>
 #include <linux/pagemap.h>
@@ -2091,7 +2092,7 @@ static ssize_t ntfs_file_aio_write_nolock(struct kiocb *iocb,
        count = iov_length(iov, nr_segs);
        pos = *ppos;
        /* We can write back this queue in page reclaim. */
-        current->backing_dev_info = mapping->backing_dev_info;
+        current->backing_dev_info = inode_to_bdi(inode);
        written = 0;
        err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
        if (err)
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 57c40e34f56f..061ba6a91bf2 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -390,12 +390,6 @@ clear_fields:
        ip->ip_conn = NULL;
 }
-static struct backing_dev_info dlmfs_backing_dev_info = {
-        .name           = "ocfs2-dlmfs",
-        .ra_pages       = 0,    /* No readahead */
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK,
-};
 static struct inode *dlmfs_get_root_inode(struct super_block *sb)
 {
        struct inode *inode = new_inode(sb);
@@ -404,7 +398,6 @@ static struct inode *dlmfs_get_root_inode(struct super_block *sb)
        if (inode) {
                inode->i_ino = get_next_ino();
                inode_init_owner(inode, NULL, mode);
-                inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
                inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
                inc_nlink(inode);
@@ -428,7 +421,6 @@ static struct inode *dlmfs_get_inode(struct inode *parent,
        inode->i_ino = get_next_ino();
        inode_init_owner(inode, parent, mode);
-        inode->i_mapping->backing_dev_info = &dlmfs_backing_dev_info;
        inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
        ip = DLMFS_I(inode);
@@ -643,10 +635,6 @@ static int __init init_dlmfs_fs(void)
        int status;
        int cleanup_inode = 0, cleanup_worker = 0;
-        status = bdi_init(&dlmfs_backing_dev_info);
-        if (status)
-                return status;
        dlmfs_inode_cache = kmem_cache_create("dlmfs_inode_cache",
                                sizeof(struct dlmfs_inode_private),
                                0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
@@ -673,7 +661,6 @@ bail:
                        kmem_cache_destroy(dlmfs_inode_cache);
                if (cleanup_worker)
                        destroy_workqueue(user_dlm_worker);
-                bdi_destroy(&dlmfs_backing_dev_info);
        } else
                printk("OCFS2 User DLM kernel interface loaded\n");
        return status;
@@ -693,7 +680,6 @@ static void __exit exit_dlmfs_fs(void)
        rcu_barrier();
        kmem_cache_destroy(dlmfs_inode_cache);
-        bdi_destroy(&dlmfs_backing_dev_info);
 }
 MODULE_AUTHOR("Oracle");
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 245db4f504da..e0f04d55fd05 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2363,7 +2363,7 @@ relock:
                        goto out_dio;
                }
        } else {
-                current->backing_dev_info = file->f_mapping->backing_dev_info;
+                current->backing_dev_info = inode_to_bdi(inode);
                written = generic_perform_write(file, from, *ppos);
                if (likely(written >= 0))
                        iocb->ki_pos = *ppos + written;
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index bbafbde3471a..f6ab41b39612 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -34,7 +34,14 @@ static unsigned long ramfs_nommu_get_unmapped_area(struct file *file,
                                                   unsigned long flags);
 static int ramfs_nommu_mmap(struct file *file, struct vm_area_struct *vma);
+static unsigned ramfs_mmap_capabilities(struct file *file)
+{
+        return NOMMU_MAP_DIRECT | NOMMU_MAP_COPY | NOMMU_MAP_READ |
+                NOMMU_MAP_WRITE | NOMMU_MAP_EXEC;
+}
 const struct file_operations ramfs_file_operations = {
+        .mmap_capabilities      = ramfs_mmap_capabilities,
        .mmap                   = ramfs_nommu_mmap,
        .get_unmapped_area      = ramfs_nommu_get_unmapped_area,
        .read                   = new_sync_read,
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index d365b1c4eb3c..889d558b4e05 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -50,14 +50,6 @@ static const struct address_space_operations ramfs_aops = {
        .set_page_dirty = __set_page_dirty_no_writeback,
 };
-static struct backing_dev_info ramfs_backing_dev_info = {
-        .name           = "ramfs",
-        .ra_pages       = 0,    /* No readahead */
-        .capabilities   = BDI_CAP_NO_ACCT_AND_WRITEBACK |
-                          BDI_CAP_MAP_DIRECT | BDI_CAP_MAP_COPY |
-                          BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP,
-};
 struct inode *ramfs_get_inode(struct super_block *sb,
                                const struct inode *dir, umode_t mode, dev_t dev)
 {
@@ -67,7 +59,6 @@ struct inode *ramfs_get_inode(struct super_block *sb,
                inode->i_ino = get_next_ino();
                inode_init_owner(inode, dir, mode);
                inode->i_mapping->a_ops = &ramfs_aops;
-                inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
                mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER);
                mapping_set_unevictable(inode->i_mapping);
                inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -267,19 +258,9 @@ static struct file_system_type ramfs_fs_type = {
 int __init init_ramfs_fs(void)
 {
        static unsigned long once;
-        int err;
        if (test_and_set_bit(0, &once))
                return 0;
+        return register_filesystem(&ramfs_fs_type);
-        err = bdi_init(&ramfs_backing_dev_info);
-        if (err)
-                return err;
-        err = register_filesystem(&ramfs_fs_type);
-        if (err)
-                bdi_destroy(&ramfs_backing_dev_info);
-        return err;
 }
 fs_initcall(init_ramfs_fs);
diff --git a/fs/romfs/mmap-nommu.c b/fs/romfs/mmap-nommu.c
index ea06c7554860..7da9e2153953 100644
--- a/fs/romfs/mmap-nommu.c
+++ b/fs/romfs/mmap-nommu.c
@@ -70,6 +70,15 @@ static int romfs_mmap(struct file *file, struct vm_area_struct *vma)
        return vma->vm_flags & (VM_SHARED | VM_MAYSHARE) ? 0 : -ENOSYS;
 }
+static unsigned romfs_mmap_capabilities(struct file *file)
+{
+        struct mtd_info *mtd = file_inode(file)->i_sb->s_mtd;
+        if (!mtd)
+                return NOMMU_MAP_COPY;
+        return mtd_mmap_capabilities(mtd);
+}
 const struct file_operations romfs_ro_fops = {
        .llseek                 = generic_file_llseek,
        .read                   = new_sync_read,
@@ -77,4 +86,5 @@ const struct file_operations romfs_ro_fops = {
        .splice_read            = generic_file_splice_read,
        .mmap                   = romfs_mmap,
        .get_unmapped_area      = romfs_get_unmapped_area,
+        .mmap_capabilities      = romfs_mmap_capabilities,
 };
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index e98dd88197d5..268733cda397 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -355,9 +355,6 @@ static struct inode *romfs_iget(struct super_block *sb, unsigned long pos)
        case ROMFH_REG:
                i->i_fop = &romfs_ro_fops;
                i->i_data.a_ops = &romfs_aops;
-                if (i->i_sb->s_mtd)
-                        i->i_data.backing_dev_info =
-                                i->i_sb->s_mtd->backing_dev_info;
                if (nextfh & ROMFH_EXEC)
                        mode |= S_IXUGO;
                break;
diff --git a/fs/super.c b/fs/super.c
index eae088f6aaae..05a021638b11 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -36,8 +36,8 @@
 #include "internal.h"
-LIST_HEAD(super_blocks);
+static LIST_HEAD(super_blocks);
-DEFINE_SPINLOCK(sb_lock);
+static DEFINE_SPINLOCK(sb_lock);
 static char *sb_writers_name[SB_FREEZE_LEVELS] = {
        "sb_writers",
@@ -185,8 +185,8 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags)
        }
        init_waitqueue_head(&s->s_writers.wait);
        init_waitqueue_head(&s->s_writers.wait_unfrozen);
+        s->s_bdi = &noop_backing_dev_info;
        s->s_flags = flags;
-        s->s_bdi = &default_backing_dev_info;
        INIT_HLIST_NODE(&s->s_instances);
        INIT_HLIST_BL_HEAD(&s->s_anon);
        INIT_LIST_HEAD(&s->s_inodes);
@@ -863,10 +863,7 @@ EXPORT_SYMBOL(free_anon_bdev);
 int set_anon_super(struct super_block *s, void *data)
 {
-        int error = get_anon_bdev(&s->s_dev);
+        return get_anon_bdev(&s->s_dev);
-        if (!error)
-                s->s_bdi = &noop_backing_dev_info;
-        return error;
 }
 EXPORT_SYMBOL(set_anon_super);
@@ -1111,7 +1108,6 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
        sb = root->d_sb;
        BUG_ON(!sb);
        WARN_ON(!sb->s_bdi);
-        WARN_ON(sb->s_bdi == &default_backing_dev_info);
        sb->s_flags |= MS_BORN;
        error = security_sb_kern_mount(sb, flags, secdata);
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index ea41649e4ca5..c49b1981ac95 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -108,8 +108,6 @@ struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
        inode->i_mtime = inode->i_atime = inode->i_ctime =
                         ubifs_current_time(inode);
        inode->i_mapping->nrpages = 0;
-        /* Disable readahead */
-        inode->i_mapping->backing_dev_info = &c->bdi;
        switch (mode & S_IFMT) {
        case S_IFREG:
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 106bf20629ce..6197154f36ca 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -156,9 +156,6 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
        if (err)
                goto out_invalid;
-        /* Disable read-ahead */
-        inode->i_mapping->backing_dev_info = &c->bdi;
        switch (inode->i_mode & S_IFMT) {
        case S_IFREG:
                inode->i_mapping->a_ops = &ubifs_file_address_operations;
@@ -2017,7 +2014,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
         * Read-ahead will be disabled because @c->bdi.ra_pages is 0.
         */
        c->bdi.name = "ubifs",
-        c->bdi.capabilities = BDI_CAP_MAP_COPY;
+        c->bdi.capabilities = 0;
        err  = bdi_init(&c->bdi);
        if (err)
                goto out_close;
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index f2d05a19d68c..1cdba95c78cb 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -735,7 +735,7 @@ xfs_file_buffered_aio_write(
        iov_iter_truncate(from, count);
        /* We can write back this queue in page reclaim */
-        current->backing_dev_info = mapping->backing_dev_info;
+        current->backing_dev_info = inode_to_bdi(inode);
 write_retry:
        trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0);