[PATCH 3/3] xen: set max_pfn_mapped

[Jeremy Fitzhardinge]

We need to set max_pfn_mapped, so do so.  Xen guarantees that at least 512k is
mapped beyond the end of the kernel image, so we can rely on that being present.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Cc: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
---
arch/x86/xen/enlighten.c |    1 +
1 file changed, 1 insertion(+)

===================================================================
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1266,6 +1266,7 @@

	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 */



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