static inline int zap_pte_range(struct mm_struct *mm, pmd_t * pmd, unsigned long address, unsigned long size)
{
pte_t * pte;
int freed;
if (pmd_none(*pmd))
return 0;
if (pmd_bad(*pmd)) {
pmd_ERROR(*pmd);
pmd_clear(pmd);
return 0;
}
pte = pte_offset(pmd, address);
address &= ~PMD_MASK;
if (address + size > PMD_SIZE)
size = PMD_SIZE - address;
size >>= PAGE_SHIFT;
freed = 0;
for (;;) {
pte_t page;
if (!size)
break;
page = ptep_get_and_clear(pte);
pte++;
size--;
if (pte_none(page))
continue;
freed += free_pte(page);
}
return freed;
}
static inline void forget_pte(pte_t page)
{
if (!pte_none(page)) {
printk("forget_pte: old mapping existed!\n");
free_pte(page);
}
}
static inline void zap_pte_range(pmd_t * pmd, unsigned long address, unsigned long size)
{
pte_t * pte;
if (pmd_none(*pmd))
return;
if (pmd_bad(*pmd)) {
printk("zap_pte_range: bad pmd (%08lx)\n", pmd_val(*pmd));
pmd_clear(pmd);
return;
}
pte = pte_offset(pmd, address);
address &= ~PMD_MASK;
if (address + size > PMD_SIZE)
size = PMD_SIZE - address;
size >>= PAGE_SHIFT;
for (;;) {
pte_t page;
if (!size)
break;
page = *pte;
pte++;
size--;
if (pte_none(page))
continue;
pte_clear(pte-1);
free_pte(page);
}
}
