nilfs2: get rid of mi_nilfs back pointer to nilfs object

This removes a back pointer to nilfs object from nilfs_mdt_info
structure that is attached to metadata files.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

1 files changed, 3 insertions, 6 deletions

diff --git a/fs/nilfs2/mdt.c b/fs/nilfs2/mdt.c
index 44326cfe1fa9..32695f3c4b9a 100644
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -78,7 +78,7 @@ static int nilfs_mdt_create_block(struct inode *inode, unsigned long block,
                                                      struct buffer_head *,
                                                      void *))
 {
-        struct the_nilfs *nilfs = NILFS_MDT(inode)->mi_nilfs;
+        struct the_nilfs *nilfs = NILFS_I_NILFS(inode);
         struct super_block *sb = inode->i_sb;
         struct nilfs_transaction_info ti;
         struct buffer_head *bh;
@@ -167,9 +167,7 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
                 unlock_buffer(bh);
                 goto failed_bh;
         }
-        bh->b_bdev = NILFS_MDT(inode)->mi_nilfs->ns_bdev;
-        bh->b_blocknr = (sector_t)blknum;
-        set_buffer_mapped(bh);
+        map_bh(bh, inode->i_sb, (sector_t)blknum);
 
         bh->b_end_io = end_buffer_read_sync;
         get_bh(bh);
@@ -412,7 +410,7 @@ nilfs_mdt_write_page(struct page *page, struct writeback_control *wbc)
                 return 0;
 
         sb = inode->i_sb;
-        nilfs = NILFS_MDT(inode)->mi_nilfs;
+        nilfs = NILFS_SB(sb)->s_nilfs;
 
         if (!sb) {
                 down_read(&nilfs->ns_writer_sem);
@@ -452,7 +450,6 @@ int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz)
         if (!mi)
                 return -ENOMEM;
 
-        mi->mi_nilfs = NILFS_I_NILFS(inode);
         init_rwsem(&mi->mi_sem);
         inode->i_private = mi;