ocfs2: remove unused ocfs2_calc_tree_trunc_credits()

ocfs2_calc_tree_trunc_credits() is not called anywhere.

Link: http://lkml.kernel.org/r/71604351584F6A4EBAE558C676F37CA4014FC2050F@H3CMLB12-EX.srv.huawei-3com.comSigned-off-by: guozhonghua <guozhonghua@h3c.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <jiangqi903@gmail.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/journal.h

@@ -575,34 +575,6 @@ static inline int ocfs2_calc_bg_discontig_credits(struct super_block *sb)
 	return ocfs2_extent_recs_per_gd(sb);
 }
 
-static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
-						unsigned int clusters_to_del,
-						struct ocfs2_dinode *fe,
-						struct ocfs2_extent_list *last_el)
-{
- 	/* for dinode + all headers in this pass + update to next leaf */
-	u16 next_free = le16_to_cpu(last_el->l_next_free_rec);
-	u16 tree_depth = le16_to_cpu(fe->id2.i_list.l_tree_depth);
-	int credits = 1 + tree_depth + 1;
-	int i;
-
-	i = next_free - 1;
-	BUG_ON(i < 0);
-
-	/* We may be deleting metadata blocks, so metadata alloc dinode +
-	   one desc. block for each possible delete. */
-	if (tree_depth && next_free == 1 &&
-	    ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del)
-		credits += 1 + tree_depth;
-
-	/* update to the truncate log. */
-	credits += OCFS2_TRUNCATE_LOG_UPDATE;
-
-	credits += ocfs2_quota_trans_credits(sb);
-
-	return credits;
-}
-
 static inline int ocfs2_jbd2_inode_add_write(handle_t *handle, struct inode *inode,
 					     loff_t start_byte, loff_t length)
 {