1 files changed, 17 insertions, 1 deletions

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index f225dd72968b..4f36987eea72 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -155,7 +155,7 @@ ia64_set_rbs_bot (void)
 
         if (stack_size > MAX_USER_STACK_SIZE)
                 stack_size = MAX_USER_STACK_SIZE;
-        current->thread.rbs_bot = STACK_TOP - stack_size;
+        current->thread.rbs_bot = PAGE_ALIGN(current->mm->start_stack - stack_size);
 }
 
 /*
@@ -648,6 +648,22 @@ count_reserved_pages (u64 start, u64 end, void *arg)
         return 0;
 }
 
+int
+find_max_min_low_pfn (unsigned long start, unsigned long end, void *arg)
+{
+        unsigned long pfn_start, pfn_end;
+#ifdef CONFIG_FLATMEM
+        pfn_start = (PAGE_ALIGN(__pa(start))) >> PAGE_SHIFT;
+        pfn_end = (PAGE_ALIGN(__pa(end - 1))) >> PAGE_SHIFT;
+#else
+        pfn_start = GRANULEROUNDDOWN(__pa(start)) >> PAGE_SHIFT;
+        pfn_end = GRANULEROUNDUP(__pa(end - 1)) >> PAGE_SHIFT;
+#endif
+        min_low_pfn = min(min_low_pfn, pfn_start);
+        max_low_pfn = max(max_low_pfn, pfn_end);
+        return 0;
+}
+
 /*
  * Boot command-line option "nolwsys" can be used to disable the use of any light-weight
  * system call handler.  When this option is in effect, all fsyscalls will end up bubbling