#ifdef CONFIG_VIRTUAL_MEM_MAP
# define LARGE_GAP 0x40000000 /* Use virtual mem map if hole is > than this */
extern unsigned long vmalloc_end;
extern struct page *vmem_map;
extern int find_largest_hole (u64 start, u64 end, void *arg);
#ifdef CONFIG_VIRTUAL_MEM_MAP
# define LARGE_GAP 0x40000000 /* Use virtual mem map if hole is > than this */
extern unsigned long vmalloc_end;
extern struct page *vmem_map;
extern int find_largest_hole (u64 start, u64 end, void *arg);