1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 2a2153ebfe0b..a0992d392d79 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -85,6 +85,21 @@ static inline int gfp_zone(gfp_t gfp)
         return zone;
 }
 
+static inline enum zone_type highest_zone(gfp_t flags)
+{
+        if (flags & __GFP_DMA)
+                return ZONE_DMA;
+#ifdef CONFIG_ZONE_DMA32
+        if (flags & __GFP_DMA32)
+                return ZONE_DMA32;
+#endif
+#ifdef CONFIG_HIGHMEM
+        if (flags & __GFP_HIGHMEM)
+                return ZONE_HIGHMEM;
+#endif
+        return ZONE_NORMAL;
+}
+
 /*
  * There is only one page-allocator function, and two main namespaces to
  * it. The alloc_page*() variants return 'struct page *' and as such