#ifndef _I386_PGALLOC_H#define _I386_PGALLOC_H #include <asm/fixmap.h>#include <linux/threads.h>#include <linux/mm.h>		/* for struct page */ #define pmd_populate_kernel(mm, pmd, pte) \		set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte))) #define pmd_populate(mm, pmd, pte) 				\	set_pmd(pmd, __pmd(_PAGE_TABLE +			\		((unsigned long long)page_to_pfn(pte) <<	\			(unsigned long long) PAGE_SHIFT)))/* * Allocate and free page tables. */extern pgd_t *pgd_alloc(struct mm_struct *);extern void pgd_free(pgd_t *pgd); extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); static inline void pte_free_kernel(pte_t *pte){	free_page((unsigned long)pte);} static inline void pte_free(struct page *pte){	__free_page(pte);}  #define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte)) #ifdef CONFIG_X86_PAE/* * In the PAE case we free the pmds as part of the pgd. */#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })#define pmd_free(x)			do { } while (0)#define __pmd_free_tlb(tlb,x)		do { } while (0)#define pud_populate(mm, pmd, pte)	BUG()#endif #define check_pgt_cache()	do { } while (0) #endif /* _I386_PGALLOC_H */