x86: honor _PAGE_PSE bit on page walks

[ tglx: arch/x86 adaptation ]

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index 6555c3d..c9a03f7 100644 (file)
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -564,7 +564,8 @@ no_context:
                 * it's allocated already.
                 */
                if ((page >> PAGE_SHIFT) < max_low_pfn
-                   && (page & _PAGE_PRESENT)) {
+                   && (page & _PAGE_PRESENT)
+                   && !(page & _PAGE_PSE)) {
                        page &= PAGE_MASK;
                        page = ((__typeof__(page) *) __va(page))[(address >> PAGE_SHIFT)
                                                                 & (PTRS_PER_PTE - 1)];

diff --git a/arch/x86/mm/fault_64.c b/arch/x86/mm/fault_64.c
index a881f07..1e63174 100644 (file)
--- a/arch/x86/mm/fault_64.c
+++ b/arch/x86/mm/fault_64.c
@@ -169,7 +169,7 @@ void dump_pagetable(unsigned long address)
        pmd = pmd_offset(pud, address);
        if (bad_address(pmd)) goto bad;
        printk("PMD %lx ", pmd_val(*pmd));
-       if (!pmd_present(*pmd)) goto ret;        
+       if (!pmd_present(*pmd) || pmd_large(*pmd)) goto ret;
 
        pte = pte_offset_kernel(pmd, address);
        if (bad_address(pte)) goto bad;