xen: set up mmu_ops before trying to set any ptes
xen_setup_stackprotector() ends up trying to set page protections,
so we need to have vm_mmu_ops set up before trying to do so.
Failing to do so causes an early boot crash.
[ Impact: Fix early crash under Xen. ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 3439616..23a4d80 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1075,6 +1075,8 @@
* Set up some pagetable state before starting to set any ptes.
*/
+ xen_init_mmu_ops();
+
/* Prevent unwanted bits from being set in PTEs. */
__supported_pte_mask &= ~_PAGE_GLOBAL;
if (!xen_initial_domain())
@@ -1099,7 +1101,6 @@
*/
xen_setup_stackprotector();
- xen_init_mmu_ops();
xen_init_irq_ops();
xen_init_cpuid_mask();