In 2.4.13pre3, mm/filemap.c:mincore_page() sets an address_space
pointer to &inode->i_mapping.  This is almost surely an error, because
i_mapping is already a pointer.

A minimal patch is attached.
-- 
Chip Salzenberg               - a.k.a. -              <chip@pobox.com>
 "We have no fuel on board, plus or minus 8 kilograms."  -- NEAR tech