ecryptfs: Convert to separately allocated bdi

Allocate struct backing_dev_info separately instead of embedding it
inside the superblock. This unifies handling of bdi among users.

CC: Tyler Hicks <tyhicks@canonical.com>
CC: ecryptfs@vger.kernel.org
Acked-by: Tyler Hicks <tyhicks@canonical.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 151872dcc1f4..9014479d0160 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -519,12 +519,11 @@ static struct dentry *ecryptfs_mount(struct file_system_type *fs_type, int flags
                 goto out;
         }
 
-        rc = bdi_setup_and_register(&sbi->bdi, "ecryptfs");
+        rc = super_setup_bdi(s);
         if (rc)
                 goto out1;
 
         ecryptfs_set_superblock_private(s, sbi);
-        s->s_bdi = &sbi->bdi;
 
         /* ->kill_sb() will take care of sbi after that point */
         sbi = NULL;
@@ -633,7 +632,6 @@ static void ecryptfs_kill_block_super(struct super_block *sb)
         if (!sb_info)
                 return;
         ecryptfs_destroy_mount_crypt_stat(&sb_info->mount_crypt_stat);
-        bdi_destroy(&sb_info->bdi);
         kmem_cache_free(ecryptfs_sb_info_cache, sb_info);
 }