pgalloc.h
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#ifndef _I386_PGALLOC_H
#define _I386_PGALLOC_H
#include <linux/config.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 */