extern int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
unsigned long pstart, unsigned long prot,
int psize, int ssize);
-extern void set_huge_psize(int psize);
extern void add_gpage(unsigned long addr, unsigned long page_size,
unsigned long number_of_pages);
extern void demote_segment_4k(struct mm_struct *mm, unsigned long addr);