coda: 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: Jan Harkes <jaharkes@cs.cmu.edu>
CC: coda@cs.cmu.edu
CC: codalist@coda.cs.cmu.edu
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, 4 insertions, 7 deletions

diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 2dea594da199..6058df380cc0 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -183,10 +183,6 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
                 goto unlock_out;
         }
 
-        error = bdi_setup_and_register(&vc->bdi, "coda");
-        if (error)
-                goto unlock_out;
-
         vc->vc_sb = sb;
         mutex_unlock(&vc->vc_mutex);
 
@@ -197,7 +193,10 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
         sb->s_magic = CODA_SUPER_MAGIC;
         sb->s_op = &coda_super_operations;
         sb->s_d_op = &coda_dentry_operations;
-        sb->s_bdi = &vc->bdi;
+
+        error = super_setup_bdi(sb);
+        if (error)
+                goto error;
 
         /* get root fid from Venus: this needs the root inode */
         error = venus_rootfid(sb, &fid);
@@ -228,7 +227,6 @@ static int coda_fill_super(struct super_block *sb, void *data, int silent)
 
 error:
         mutex_lock(&vc->vc_mutex);
-        bdi_destroy(&vc->bdi);
         vc->vc_sb = NULL;
         sb->s_fs_info = NULL;
 unlock_out:
@@ -240,7 +238,6 @@ static void coda_put_super(struct super_block *sb)
 {
         struct venus_comm *vcp = coda_vcp(sb);
         mutex_lock(&vcp->vc_mutex);
-        bdi_destroy(&vcp->bdi);
         vcp->vc_sb = NULL;
         sb->s_fs_info = NULL;
         mutex_unlock(&vcp->vc_mutex);