I get this compile error on 2.6.23-rc1-mm1 on i386. Config file attached (this basic config file worked on 2.6.22-rc6-mm1) lx26-23-rc1-mm1/mm/sparse.c: In function 'sparse_init': lx26-23-rc1-mm1/mm/sparse.c:482: error: implicit declaration of function 'sparse_early_usemap_alloc' lx26-23-rc1-mm1/mm/sparse.c:482: warning: assignment makes pointer from integer without a cast