1 files changed, 20 insertions, 8 deletions

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index ad8b9733d6b3..621afb6343dc 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -428,6 +428,16 @@ static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs,
 }
 #endif
 
+static int spurious_fault_check(unsigned long error_code, pte_t *pte)
+{
+        if ((error_code & PF_WRITE) && !pte_write(*pte))
+                return 0;
+        if ((error_code & PF_INSTR) && !pte_exec(*pte))
+                return 0;
+
+        return 1;
+}
+
 /*
  * Handle a spurious fault caused by a stale TLB entry.  This allows
  * us to lazily refresh the TLB when increasing the permissions of a
@@ -457,20 +467,21 @@ static int spurious_fault(unsigned long address,
         if (!pud_present(*pud))
                 return 0;
 
+        if (pud_large(*pud))
+                return spurious_fault_check(error_code, (pte_t *) pud);
+
         pmd = pmd_offset(pud, address);
         if (!pmd_present(*pmd))
                 return 0;
 
+        if (pmd_large(*pmd))
+                return spurious_fault_check(error_code, (pte_t *) pmd);
+
         pte = pte_offset_kernel(pmd, address);
         if (!pte_present(*pte))
                 return 0;
 
-        if ((error_code & PF_WRITE) && !pte_write(*pte))
-                return 0;
-        if ((error_code & PF_INSTR) && !pte_exec(*pte))
-                return 0;
-
-        return 1;
+        return spurious_fault_check(error_code, pte);
 }
 
 /*
@@ -947,11 +958,12 @@ void vmalloc_sync_all(void)
         for (address = start; address <= VMALLOC_END; address += PGDIR_SIZE) {
                 if (!test_bit(pgd_index(address), insync)) {
                         const pgd_t *pgd_ref = pgd_offset_k(address);
+                        unsigned long flags;
                         struct page *page;
 
                         if (pgd_none(*pgd_ref))
                                 continue;
-                        spin_lock(&pgd_lock);
+                        spin_lock_irqsave(&pgd_lock, flags);
                         list_for_each_entry(page, &pgd_list, lru) {
                                 pgd_t *pgd;
                                 pgd = (pgd_t *)page_address(page) + pgd_index(address);
@@ -960,7 +972,7 @@ void vmalloc_sync_all(void)
                                 else
                                         BUG_ON(pgd_page_vaddr(*pgd) != pgd_page_vaddr(*pgd_ref));
                         }
-                        spin_unlock(&pgd_lock);
+                        spin_unlock_irqrestore(&pgd_lock, flags);
                         set_bit(pgd_index(address), insync);
                 }
                 if (address == start)