ext4: convert number of blocks to clusters properly

commit 810da240f221d64bf90020f25941b05b378186fe upstream.

We're using macro EXT4_B2C() to convert number of blocks to number of
clusters for bigalloc file systems.  However, we should be using
EXT4_NUM_B2C().

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: Lingzhu Xiang <lxiang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 231cacb..b407c78 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1112,7 +1112,7 @@
 		ext4_inode_bitmap_set(sb, gdp, group_data->inode_bitmap);
 		ext4_inode_table_set(sb, gdp, group_data->inode_table);
 		ext4_free_group_clusters_set(sb, gdp,
-					     EXT4_B2C(sbi, group_data->free_blocks_count));
+			EXT4_NUM_B2C(sbi, group_data->free_blocks_count));
 		ext4_free_inodes_set(sb, gdp, EXT4_INODES_PER_GROUP(sb));
 		gdp->bg_flags = cpu_to_le16(*bg_flags);
 		gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
@@ -1210,7 +1210,7 @@
 
 	/* Update the free space counts */
 	percpu_counter_add(&sbi->s_freeclusters_counter,
-			   EXT4_B2C(sbi, free_blocks));
+			   EXT4_NUM_B2C(sbi, free_blocks));
 	percpu_counter_add(&sbi->s_freeinodes_counter,
 			   EXT4_INODES_PER_GROUP(sb) * flex_gd->count);
 
@@ -1219,7 +1219,7 @@
 	    sbi->s_log_groups_per_flex) {
 		ext4_group_t flex_group;
 		flex_group = ext4_flex_group(sbi, group_data[0].group);
-		atomic_add(EXT4_B2C(sbi, free_blocks),
+		atomic_add(EXT4_NUM_B2C(sbi, free_blocks),
 			   &sbi->s_flex_groups[flex_group].free_clusters);
 		atomic_add(EXT4_INODES_PER_GROUP(sb) * flex_gd->count,
 			   &sbi->s_flex_groups[flex_group].free_inodes);