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-rw-r--r--fs/ext2/balloc.c22
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++) {