I'm sure there's a good reason for these functions to take virtual addresses as unsigned longs, so suppress the warnings and cast them to the proper types before calling the virt/phys conversion functions A perfectly acceptable alternative would be to go and change free_pages() to stop taking unsigned longs for virtual addresses. Signed-off-by: Dave Hansen --- memhotplug-dave/mm/page_alloc.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff -puN mm/page_alloc.c~A0-virts_are_voidstar mm/page_alloc.c --- memhotplug/mm/page_alloc.c~A0-virts_are_voidstar Thu Aug 5 09:40:59 2004 +++ memhotplug-dave/mm/page_alloc.c Thu Aug 5 09:40:59 2004 @@ -808,8 +808,8 @@ EXPORT_SYMBOL(__free_pages); fastcall void free_pages(unsigned long addr, unsigned int order) { if (addr != 0) { - BUG_ON(!virt_addr_valid(addr)); - __free_pages(virt_to_page(addr), order); + BUG_ON(!virt_addr_valid((void *)addr)); + __free_pages(virt_to_page((void *)addr), order); } } _