udf: Make s_block_bitmap standard array

struct udf_bitmap has array of buffer pointers attached to it. The code
unnecessarily used s_block_bitmap as a pointer to the array instead of
the standard trick of using 0 length array in the declaration. Change
that to make code more readable and actually shrink the structure by one
pointer.

Signed-off-by: Jan Kara <jack@suse.cz>

2 files changed, 1 insertions, 2 deletions

diff --git a/fs/udf/super.c b/fs/udf/super.c
index da8ce9f14387..f8830803d389 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1023,7 +1023,6 @@ static struct udf_bitmap *udf_sb_alloc_bitmap(struct super_block *sb, u32 index)
         if (bitmap == NULL)
                 return NULL;
 
-        bitmap->s_block_bitmap = (struct buffer_head **)(bitmap + 1);
         bitmap->s_nr_groups = nr_groups;
         return bitmap;
 }
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
index 8d1c9d4f439e..4f7ddb796991 100644
--- a/fs/udf/udf_sb.h
+++ b/fs/udf/udf_sb.h
@@ -83,7 +83,7 @@ struct udf_bitmap {
         __u32                   s_extLength;
         __u32                   s_extPosition;
         int                     s_nr_groups;
-        struct buffer_head      **s_block_bitmap;
+        struct buffer_head      *s_block_bitmap[0];
 };
 
 struct udf_part_map {