ext4: rename ext4_free_blocks_after_init() to ext4_free_clusters_after_init()

This function really returns the number of clusters after initializing
an uninitalized block bitmap has been initialized.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 76db2f1..90a3ed7 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2253,7 +2253,7 @@
 	 */
 	if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
 		meta_group_info[i]->bb_free =
-			ext4_free_blocks_after_init(sb, group, desc);
+			ext4_free_clusters_after_init(sb, group, desc);
 	} else {
 		meta_group_info[i]->bb_free =
 			ext4_free_group_clusters(sb, desc);
@@ -2840,7 +2840,7 @@
 	if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
 		gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
 		ext4_free_group_clusters_set(sb, gdp,
-					     ext4_free_blocks_after_init(sb,
+					     ext4_free_clusters_after_init(sb,
 						ac->ac_b_ex.fe_group, gdp));
 	}
 	len = ext4_free_group_clusters(sb, gdp) - ac->ac_b_ex.fe_len;