/* mmlist_lock and vma->vm_mm->page_table_lock are held */
static inline void unuse_pgd(struct vm_area_struct * vma, pgd_t *dir,
unsigned long address, unsigned long size,
swp_entry_t entry, struct page* page)
{
pmd_t * pmd;
unsigned long offset, end;
if (pgd_none(*dir))
return;
if (pgd_bad(*dir)) {
pgd_ERROR(*dir);
pgd_clear(dir);
return;
}
pmd = pmd_offset(dir, address);
offset = address & PGDIR_MASK;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
if (address >= end)
BUG();
do {
unuse_pmd(vma, pmd, address, end - address, offset, entry,
page);
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address && (address < end));
}
static inline int unuse_pgd(struct vm_area_struct * vma, pgd_t *dir,
unsigned long address, unsigned long size,
unsigned int type, unsigned long page)
{
pmd_t * pmd;
unsigned long offset, end;
if (pgd_none(*dir))
return 0;
if (pgd_bad(*dir)) {
printk("unuse_pgd: bad pgd (%08lx)\n", pgd_val(*dir));
pgd_clear(dir);
return 0;
}
pmd = pmd_offset(dir, address);
offset = address & PGDIR_MASK;
address &= ~PGDIR_MASK;
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
do {
if (unuse_pmd(vma, pmd, address, end - address, offset, type, page))
return 1;
address = (address + PMD_SIZE) & PMD_MASK;
pmd++;
} while (address < end);
return 0;
}