nilfs2: get rid of back pointer to writable sb instance

Nilfs object holds a back pointer to a writable super block instance
in nilfs->ns_writer, and this became eliminable since sb is now made
per device and all inodes have a valid pointer to it.

This deletes the ns_writer pointer and a reader/writer semaphore
protecting it.

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

1 files changed, 0 insertions, 4 deletions

diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index dcb5a9812c6c..5d2711c28da7 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -440,7 +440,6 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
         segnum[2] = ri->ri_segnum;
         segnum[3] = ri->ri_nextnum;
 
-        nilfs_attach_writer(nilfs, sbi);
         /*
          * Releasing the next segment of the latest super root.
          * The next segment is invalidated by this recovery.
@@ -480,7 +479,6 @@ static int nilfs_prepare_segment_for_recovery(struct the_nilfs *nilfs,
 
  failed:
         /* No need to recover sufile because it will be destroyed on error */
-        nilfs_detach_writer(nilfs, sbi);
         return err;
 }
 
@@ -599,7 +597,6 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
         };
         int state = RF_INIT_ST;
 
-        nilfs_attach_writer(nilfs, sbi);
         pseg_start = ri->ri_lsegs_start;
         seg_seq = ri->ri_lsegs_start_seq;
         segnum = nilfs_get_segnum_of_block(nilfs, pseg_start);
@@ -690,7 +687,6 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
  out:
         brelse(bh_sum);
         dispose_recovery_list(&dsync_blocks);
-        nilfs_detach_writer(nilfs, sbi);
         return err;
 
  confused: