Merge branch 'linus' into x86/pat2

[linux-2.6-omap-h63xx.git] / arch / x86 / mm / ioremap.c

diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index cac6da54203bfdee878d61c2debb71104ce4f0b6..6ab3196d12b412979cbfba55467968b513670a49 100644 (file)
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -83,6 +83,25 @@ int page_is_ram(unsigned long pagenr)
        return 0;
 }
 
+int pagerange_is_ram(unsigned long start, unsigned long end)
+{
+       int ram_page = 0, not_rampage = 0;
+       unsigned long page_nr;
+
+       for (page_nr = (start >> PAGE_SHIFT); page_nr < (end >> PAGE_SHIFT);
+            ++page_nr) {
+               if (page_is_ram(page_nr))
+                       ram_page = 1;
+               else
+                       not_rampage = 1;
+
+               if (ram_page == not_rampage)
+                       return -1;
+       }
+
+       return ram_page;
+}
+
 /*
  * Fix up the linear direct mapping of the kernel to avoid cache attribute
  * conflicts.