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Diffstat (limited to 'arch/x86/xen/p2m.c')
-rw-r--r--arch/x86/xen/p2m.c18
1 files changed, 6 insertions, 12 deletions
diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c
index ddc81a06edb9..fd12d7ce7ff9 100644
--- a/arch/x86/xen/p2m.c
+++ b/arch/x86/xen/p2m.c
@@ -241,21 +241,15 @@ void __init xen_build_dynamic_phys_to_machine(void)
* As long as the mfn_list has enough entries to completely
* fill a p2m page, pointing into the array is ok. But if
* not the entries beyond the last pfn will be undefined.
- * And guessing that the 'what-ever-there-is' does not take it
- * too kindly when changing it to invalid markers, a new page
- * is allocated, initialized and filled with the valid part.
*/
if (unlikely(pfn + P2M_PER_PAGE > max_pfn)) {
unsigned long p2midx;
- unsigned long *p2m = extend_brk(PAGE_SIZE, PAGE_SIZE);
- p2m_init(p2m);
-
- for (p2midx = 0; pfn + p2midx < max_pfn; p2midx++) {
- p2m[p2midx] = mfn_list[pfn + p2midx];
- }
- p2m_top[topidx][mididx] = p2m;
- } else
- p2m_top[topidx][mididx] = &mfn_list[pfn];
+
+ p2midx = max_pfn % P2M_PER_PAGE;
+ for ( ; p2midx < P2M_PER_PAGE; p2midx++)
+ mfn_list[pfn + p2midx] = INVALID_P2M_ENTRY;
+ }
+ p2m_top[topidx][mididx] = &mfn_list[pfn];
}
m2p_override_init();