[GFS2] Add a comment about reading the super block

	return 0;

}

/**

 * gfs2_read_super - Read the gfs2 super block from disk

 * @sb: The VFS super block

 * @sector: The location of the super block

 *

 * This uses the bio functions to read the super block from disk

 * because we want to be 100% sure that we never read cached data.

 * A super block is read twice only during each GFS2 mount and is

 * never written to by the filesystem. The first time its read no

 * locks are held, and the only details which are looked at are those

 * relating to the locking protocol. Once locking is up and working,

 * the sb is read again under the lock to establish the location of

 * the master directory (contains pointers to journals etc) and the

 * root directory.

 *

 * Returns: A page containing the sb or NULL

 */

struct page *gfs2_read_super(struct super_block *sb, sector_t sector)

{

	struct page *page;