1 files changed, 20 insertions, 2 deletions

diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 2c00953d4b0b..433a213a8bd9 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -521,6 +521,26 @@ io_error:
         goto out_release;
 }
 
+#ifdef EXT2FS_DEBUG
+
+static int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
+
+unsigned long ext2_count_free (struct buffer_head * map, unsigned int numchars)
+{
+        unsigned int i;
+        unsigned long sum = 0;
+
+        if (!map)
+                return (0);
+        for (i = 0; i < numchars; i++)
+                sum += nibblemap[map->b_data[i] & 0xf] +
+                        nibblemap[(map->b_data[i] >> 4) & 0xf];
+        return (sum);
+}
+
+#endif  /*  EXT2FS_DEBUG  */
+
+/* Superblock must be locked */
 unsigned long ext2_count_free_blocks (struct super_block * sb)
 {
         struct ext2_group_desc * desc;
@@ -530,7 +550,6 @@ unsigned long ext2_count_free_blocks (struct super_block * sb)
         unsigned long bitmap_count, x;
         struct ext2_super_block *es;
 
-        lock_super (sb);
         es = EXT2_SB(sb)->s_es;
         desc_count = 0;
         bitmap_count = 0;
@@ -554,7 +573,6 @@ unsigned long ext2_count_free_blocks (struct super_block * sb)
         printk("ext2_count_free_blocks: stored = %lu, computed = %lu, %lu\n",
                 (long)le32_to_cpu(es->s_free_blocks_count),
                 desc_count, bitmap_count);
-        unlock_super (sb);
         return bitmap_count;
 #else
         for (i = 0; i < EXT2_SB(sb)->s_groups_count; i++) {