xen: set max_pfn_mapped

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: the arch/x86 maintainers <x86@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 316623cf411fb808249a357bcb0de45cba16b133..76ad1efaf09e9da019674e20aae3c99ea45652fb 100644 (file)
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1304,6 +1304,7 @@ asmlinkage void __init xen_start_kernel(void)
 
        init_pg_tables_start = __pa(pgd);
        init_pg_tables_end = __pa(pgd) + xen_start_info->nr_pt_frames*PAGE_SIZE;
+       max_pfn_mapped = (init_pg_tables_end + 512*1024) >> PAGE_SHIFT;
 
        init_mm.pgd = pgd; /* use the Xen pagetables to start */