1 files changed, 7 insertions, 3 deletions

diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 90bac0aac3a5..be1a464f6d66 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -50,7 +50,7 @@ phys_addr_t xen_extra_mem_start, xen_extra_mem_size;
  */
 #define EXTRA_MEM_RATIO         (10)
 
-static __init void xen_add_extra_mem(unsigned long pages)
+static void __init xen_add_extra_mem(unsigned long pages)
 {
         unsigned long pfn;
 
@@ -166,7 +166,7 @@ static unsigned long __init xen_set_identity(const struct e820entry *list,
                 if (last > end)
                         continue;
 
-                if (entry->type == E820_RAM) {
+                if ((entry->type == E820_RAM) || (entry->type == E820_UNUSABLE)) {
                         if (start > start_pci)
                                 identity += set_phys_range_identity(
                                                 PFN_UP(start_pci), PFN_DOWN(start));
@@ -227,7 +227,11 @@ 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;
 
@@ -336,7 +340,7 @@ static void __init fiddle_vdso(void)
 #endif
 }
 
-static __cpuinit int register_callback(unsigned type, const void *func)
+static int __cpuinit register_callback(unsigned type, const void *func)
 {
         struct callback_register callback = {
                 .type = type,