ext4: drop ext4_es_delayed_clu()

Since we move ext4_da_update_reserve_space() to ext4_es_insert_extent(),
no one uses ext4_es_delayed_clu() and __es_delayed_clu(), just drop
them.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Link: https://patch.msgid.link/20240813123452.2824659-8-yi.zhang@huaweicloud.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/extents_status.c

@@ -2178,94 +2178,6 @@ void ext4_es_insert_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
 	return;
 }
 
-/*
- * __es_delayed_clu - count number of clusters containing blocks that
- *                    are delayed only
- *
- * @inode - file containing block range
- * @start - logical block defining start of range
- * @end - logical block defining end of range
- *
- * Returns the number of clusters containing only delayed (not delayed
- * and unwritten) blocks in the range specified by @start and @end.  Any
- * cluster or part of a cluster within the range and containing a delayed
- * and not unwritten block within the range is counted as a whole cluster.
- */
-static unsigned int __es_delayed_clu(struct inode *inode, ext4_lblk_t start,
-				     ext4_lblk_t end)
-{
-	struct ext4_es_tree *tree = &EXT4_I(inode)->i_es_tree;
-	struct extent_status *es;
-	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
-	struct rb_node *node;
-	ext4_lblk_t first_lclu, last_lclu;
-	unsigned long long last_counted_lclu;
-	unsigned int n = 0;
-
-	/* guaranteed to be unequal to any ext4_lblk_t value */
-	last_counted_lclu = ~0ULL;
-
-	es = __es_tree_search(&tree->root, start);
-
-	while (es && (es->es_lblk <= end)) {
-		if (ext4_es_is_delonly(es)) {
-			if (es->es_lblk <= start)
-				first_lclu = EXT4_B2C(sbi, start);
-			else
-				first_lclu = EXT4_B2C(sbi, es->es_lblk);
-
-			if (ext4_es_end(es) >= end)
-				last_lclu = EXT4_B2C(sbi, end);
-			else
-				last_lclu = EXT4_B2C(sbi, ext4_es_end(es));
-
-			if (first_lclu == last_counted_lclu)
-				n += last_lclu - first_lclu;
-			else
-				n += last_lclu - first_lclu + 1;
-			last_counted_lclu = last_lclu;
-		}
-		node = rb_next(&es->rb_node);
-		if (!node)
-			break;
-		es = rb_entry(node, struct extent_status, rb_node);
-	}
-
-	return n;
-}
-
-/*
- * ext4_es_delayed_clu - count number of clusters containing blocks that
- *                       are both delayed and unwritten
- *
- * @inode - file containing block range
- * @lblk - logical block defining start of range
- * @len - number of blocks in range
- *
- * Locking for external use of __es_delayed_clu().
- */
-unsigned int ext4_es_delayed_clu(struct inode *inode, ext4_lblk_t lblk,
-				 ext4_lblk_t len)
-{
-	struct ext4_inode_info *ei = EXT4_I(inode);
-	ext4_lblk_t end;
-	unsigned int n;
-
-	if (len == 0)
-		return 0;
-
-	end = lblk + len - 1;
-	WARN_ON(end < lblk);
-
-	read_lock(&ei->i_es_lock);
-
-	n = __es_delayed_clu(inode, lblk, end);
-
-	read_unlock(&ei->i_es_lock);
-
-	return n;
-}
-
 /*
  * __revise_pending - makes, cancels, or leaves unchanged pending cluster
  *                    reservations for a specified block range depending

fs/ext4/extents_status.h

@@ -252,8 +252,6 @@ extern bool ext4_is_pending(struct inode *inode, ext4_lblk_t lblk);
 extern void ext4_es_insert_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
 					  ext4_lblk_t len, bool lclu_allocated,
 					  bool end_allocated);
-extern unsigned int ext4_es_delayed_clu(struct inode *inode, ext4_lblk_t lblk,
-					ext4_lblk_t len);
 extern void ext4_clear_inode_es(struct inode *inode);
 
 #endif /* _EXT4_EXTENTS_STATUS_H */