pprev = (struct page **)page->private; 
pprev = (struct page **)page_private(page); 
static inline void pgd_list_del(pgd_t *pgd){	struct page *next, **pprev, *page = virt_to_page(pgd);	next = (struct page *)page->index;	pprev = (struct page **)page->private;	*pprev = next;	if (next)		next->private = (unsigned long)pprev;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/4c21e2f2441dc5fbb957b030333f5a3f2d02dea7/pgtable.c/buggy/arch/i386/mm/pgtable.c