nilfs2: clean up get/put function of a segment usage

This eliminates obsolete nilfs_get_sufile_get_segment_usage() and
nilfs_set_sufile_segment_usage() from sufile.

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

diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 3eed998..b6c36d0 100644 (file)
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -430,78 +430,6 @@ void nilfs_sufile_do_free(struct inode *sufile, __u64 segnum,
 }
 
 /**
- * nilfs_sufile_get_segment_usage - get a segment usage
- * @sufile: inode of segment usage file
- * @segnum: segment number
- * @sup: pointer to segment usage
- * @bhp: pointer to buffer head
- *
- * Description: nilfs_sufile_get_segment_usage() acquires the segment usage
- * specified by @segnum.
- *
- * Return Value: On success, 0 is returned, and the segment usage and the
- * buffer head of the buffer on which the segment usage is located are stored
- * in the place pointed by @sup and @bhp, respectively. On error, one of the
- * following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-EINVAL - Invalid segment usage number.
- */
-int nilfs_sufile_get_segment_usage(struct inode *sufile, __u64 segnum,
-                                  struct nilfs_segment_usage **sup,
-                                  struct buffer_head **bhp)
-{
-       struct buffer_head *bh;
-       struct nilfs_segment_usage *su;
-       void *kaddr;
-       int ret;
-
-       /* segnum is 0 origin */
-       if (segnum >= nilfs_sufile_get_nsegments(sufile))
-               return -EINVAL;
-       down_write(&NILFS_MDT(sufile)->mi_sem);
-       ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 1, &bh);
-       if (ret < 0)
-               goto out_sem;
-       kaddr = kmap(bh->b_page);
-       su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr);
-       if (nilfs_segment_usage_error(su)) {
-               kunmap(bh->b_page);
-               brelse(bh);
-               ret = -EINVAL;
-               goto out_sem;
-       }
-
-       if (sup != NULL)
-               *sup = su;
-       *bhp = bh;
-
- out_sem:
-       up_write(&NILFS_MDT(sufile)->mi_sem);
-       return ret;
-}
-
-/**
- * nilfs_sufile_put_segment_usage - put a segment usage
- * @sufile: inode of segment usage file
- * @segnum: segment number
- * @bh: buffer head
- *
- * Description: nilfs_sufile_put_segment_usage() releases the segment usage
- * specified by @segnum. @bh must be the buffer head which have been returned
- * by a previous call to nilfs_sufile_get_segment_usage() with @segnum.
- */
-void nilfs_sufile_put_segment_usage(struct inode *sufile, __u64 segnum,
-                                   struct buffer_head *bh)
-{
-       kunmap(bh->b_page);
-       brelse(bh);
-}
-
-/**
  * nilfs_sufile_mark_dirty - mark the buffer having a segment usage dirty
  * @sufile: inode of segment usage file
  * @segnum: segment number

diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index e1186bf..15163b8 100644 (file)
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -37,11 +37,6 @@ static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile)
 unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile);
 
 int nilfs_sufile_alloc(struct inode *, __u64 *);
-int nilfs_sufile_get_segment_usage(struct inode *, __u64,
-                                  struct nilfs_segment_usage **,
-                                  struct buffer_head **);
-void nilfs_sufile_put_segment_usage(struct inode *, __u64,
-                                   struct buffer_head *);
 int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
                                   unsigned long nblocks, time_t modtime);