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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>
This commit is contained in:
Jeremy Fitzhardinge 2009-10-27 16:54:19 -07:00
parent 964fe080d9
commit 973df35ed9
1 changed files with 2 additions and 1 deletions
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3
arch/x86/xen/enlighten.c
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@ -1075,6 +1075,8 @@ asmlinkage void __init xen_start_kernel(void)
* Set up some pagetable state before starting to set any ptes. * Set up some pagetable state before starting to set any ptes.
*/ */
xen_init_mmu_ops();
/* Prevent unwanted bits from being set in PTEs. */ /* Prevent unwanted bits from being set in PTEs. */
__supported_pte_mask &= ~_PAGE_GLOBAL; __supported_pte_mask &= ~_PAGE_GLOBAL;
if (!xen_initial_domain()) if (!xen_initial_domain())
@ -1099,7 +1101,6 @@ asmlinkage void __init xen_start_kernel(void)
*/ */
xen_setup_stackprotector(); xen_setup_stackprotector();
xen_init_mmu_ops();
xen_init_irq_ops(); xen_init_irq_ops();
xen_init_cpuid_mask(); xen_init_cpuid_mask();