Merge remote branch 'origin/master' into next

1 files changed, 6 insertions, 4 deletions

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index be1a464f6d66..60aeeb56948f 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -227,11 +227,7 @@ char * __init xen_memory_setup(void)
 
         memcpy(map_raw, map, sizeof(map));
         e820.nr_map = 0;
-#ifdef CONFIG_X86_32
         xen_extra_mem_start = mem_end;
-#else
-        xen_extra_mem_start = max((1ULL << 32), mem_end);
-#endif
         for (i = 0; i < memmap.nr_entries; i++) {
                 unsigned long long end;
 
@@ -266,6 +262,12 @@ char * __init xen_memory_setup(void)
                 if (map[i].size > 0)
                         e820_add_region(map[i].addr, map[i].size, map[i].type);
         }
+        /* Align the balloon area so that max_low_pfn does not get set
+         * to be at the _end_ of the PCI gap at the far end (fee01000).
+         * Note that xen_extra_mem_start gets set in the loop above to be
+         * past the last E820 region. */
+        if (xen_initial_domain() && (xen_extra_mem_start < (1ULL<<32)))
+                xen_extra_mem_start = (1ULL<<32);
 
         /*
          * In domU, the ISA region is normal, usable memory, but we