static void gnttab_page_free(struct page *page, unsigned int order)
{
BUG_ON(order);
ClearPageForeign(page);
gnttab_reset_grant_page(page);
put_page(page);
}
void pte_free(struct page *pte)
{
unsigned long va = (unsigned long)__va(page_to_pfn(pte)<<PAGE_SHIFT);
if (!pte_write(*virt_to_ptep(va)))
BUG_ON(HYPERVISOR_update_va_mapping(
va, pfn_pte(page_to_pfn(pte), PAGE_KERNEL), 0));
ClearPageForeign(pte);
init_page_count(pte);
__free_page(pte);
}
int gnttab_unmap_refs(struct gnttab_unmap_grant_ref *unmap_ops,
struct gnttab_unmap_grant_ref *kunmap_ops,
struct page **pages, unsigned int count)
{
unsigned int i;
int ret;
ret = HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, unmap_ops, count);
if (ret)
return ret;
for (i = 0; i < count; i++)
ClearPageForeign(pages[i]);
return clear_foreign_p2m_mapping(unmap_ops, kunmap_ops, pages, count);
}
static void gnttab_page_free(struct page *page)
{
ClearPageForeign(page);
gnttab_reset_grant_page(page);
put_page(page);
}
