2009-05-13 Pavel Roskin <proski@gnu.org>

* kernel/disk.c (grub_disk_read): Use void pointer for the
	buffer.
	(grub_disk_write): Use const void pointer for the buffer.
	Adjust all callers.  Remove unnecessary casts.

fs/sfs.c

@@ -272,7 +272,7 @@ grub_sfs_mount (grub_disk_t disk)
 
   /* Read the rootblock.  */
   grub_disk_read (disk, 0, 0, sizeof (struct grub_sfs_rblock),
-		  (char *) &data->rblock);
+		  &data->rblock);
   if (grub_errno)
     goto fail;