[PATCH 4/9] x86/mm: Convert arch_sync_kernel_mappings() to ptdescs

[Vishal Moola <vishal.moola@xxxxxxxxx>]

Convert arch_sync_kernel_mappings() to ptdescs in preparation for
the eventual splitting of ptdescs from struct page.

Following this patch, we can successfully boot a 32-bit x86 kernel with
separately allocated ptdescs.

Signed-off-by: Vishal Moola <vishal.moola@xxxxxxxxx>
---
 arch/x86/mm/fault.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 63de8e8684f2..6c72d6668416 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -269,17 +269,17 @@ void arch_sync_kernel_mappings(unsigned long start, 
unsigned long end)
        for (addr = start & PMD_MASK;
             addr >= TASK_SIZE_MAX && addr < VMALLOC_END;
             addr += PMD_SIZE) {
-               struct page *page;
+               struct ptdesc *ptdesc;
 
                spin_lock(&pgd_lock);
-               list_for_each_entry(page, &pgd_list, lru) {
+               list_for_each_entry(ptdesc, &pgd_list, pt_list) {
                        spinlock_t *pgt_lock;
 
                        /* the pgt_lock only for Xen */
-                       pgt_lock = &pgd_page_get_mm(page)->page_table_lock;
+                       pgt_lock = 
&pgd_page_get_mm(ptdesc_page(ptdesc))->page_table_lock;
 
                        spin_lock(pgt_lock);
-                       vmalloc_sync_one(page_address(page), addr);
+                       vmalloc_sync_one(ptdesc_address(ptdesc), addr);
                        spin_unlock(pgt_lock);
                }
                spin_unlock(&pgd_lock);
-- 
2.54.0