]> err.no Git - linux-2.6/blobdiff - fs/ext2/balloc.c
[PATCH] fs/ocfs2/dlm/: cleanups
[linux-2.6] / fs / ext2 / balloc.c
index 2c00953d4b0b909b483f05f94b33da7f893c3acf..433a213a8bd9450f7f1ab3e7926002217d6cf1f9 100644 (file)
@@ -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++) {