[PATCH v2 9/9] x86/xen: Convert xen_mm_unpin_all() to ptdescs

[Vishal Moola <vishal.moola@gmail.com>]

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.

Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: William Kucharski <william.kucharski@linux.dev>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Vishal Moola <vishal.moola@gmail.com>
---
 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 7b23a34db8ff..6ff5a7130e53 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -947,16 +947,16 @@ 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