[PATCH 9/9] x86/xen: Convert xen_mm_unpin_all() to ptdescs

[Vishal Moola <vishal.moola@xxxxxxxxx>]

Convert xen_mm_unpin_all() to ptdescs in preparation for the eventual
splitting of ptdescs from struct page. Continue checking PagePinned
through the underlying page as we do not have a per-memdesc api yet.

Signed-off-by: Vishal Moola <vishal.moola@xxxxxxxxx>
---
 arch/x86/xen/mmu_pv.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index b2f6e7b7c545..c4731c1e842d 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -939,16 +939,16 @@ static void xen_pgd_unpin(struct mm_struct *mm)
  */
 void xen_mm_unpin_all(void)
 {
-       struct page *page;
+       struct ptdesc *ptdesc;
 
        spin_lock(&init_mm.page_table_lock);
        spin_lock(&pgd_lock);
 
-       list_for_each_entry(page, &pgd_list, lru) {
-               if (PageSavePinned(page)) {
-                       BUG_ON(!PagePinned(page));
-                       __xen_pgd_unpin(&init_mm, (pgd_t *)page_address(page));
-                       ClearPageSavePinned(page);
+       list_for_each_entry(ptdesc, &pgd_list, pt_list) {
+               if (PageSavePinned(ptdesc_page(ptdesc))) {
+                       BUG_ON(!PagePinned(ptdesc_page(ptdesc)));
+                       __xen_pgd_unpin(&init_mm, (pgd_t 
*)ptdesc_address(ptdesc));
+                       ClearPageSavePinned(ptdesc_page(ptdesc));
                }
        }
 
-- 
2.54.0