ext4: fix the free blocks calculation for ext3 file systems w/ uninit_bg

[pandora-kernel.git] / fs / ext4 / balloc.c

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 99b6324..cee7812 100644 (file)
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -90,8 +90,8 @@ unsigned ext4_num_overhead_clusters(struct super_block *sb,
         * unusual file system layouts.
         */
        if (ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp), block_group)) {
-               block_cluster = EXT4_B2C(sbi, (start -
-                                              ext4_block_bitmap(sb, gdp)));
+               block_cluster = EXT4_B2C(sbi,
+                                        ext4_block_bitmap(sb, gdp) - start);
                if (block_cluster < num_clusters)
                        block_cluster = -1;
                else if (block_cluster == num_clusters) {
@@ -102,7 +102,7 @@ unsigned ext4_num_overhead_clusters(struct super_block *sb,
 
        if (ext4_block_in_group(sb, ext4_inode_bitmap(sb, gdp), block_group)) {
                inode_cluster = EXT4_B2C(sbi,
-                                        start - ext4_inode_bitmap(sb, gdp));
+                                        ext4_inode_bitmap(sb, gdp) - start);
                if (inode_cluster < num_clusters)
                        inode_cluster = -1;
                else if (inode_cluster == num_clusters) {
@@ -114,7 +114,7 @@ unsigned ext4_num_overhead_clusters(struct super_block *sb,
        itbl_blk = ext4_inode_table(sb, gdp);
        for (i = 0; i < sbi->s_itb_per_group; i++) {
                if (ext4_block_in_group(sb, itbl_blk + i, block_group)) {
-                       c = EXT4_B2C(sbi, start - itbl_blk + i);
+                       c = EXT4_B2C(sbi, itbl_blk + i - start);
                        if ((c < num_clusters) || (c == inode_cluster) ||
                            (c == block_cluster) || (c == itbl_cluster))
                                continue;