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-rw-r--r--include/linux/gfp.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 313dfe9b443a..8b2eab90abb6 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -11,7 +11,7 @@ struct vm_area_struct;
/*
* GFP bitmasks..
*/
-/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low two bits) */
+/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low three bits) */
#define __GFP_DMA ((__force gfp_t)0x01u)
#define __GFP_HIGHMEM ((__force gfp_t)0x02u)
#ifdef CONFIG_DMA_IS_DMA32
@@ -74,7 +74,12 @@ struct vm_area_struct;
#define GFP_DMA32 __GFP_DMA32
-#define gfp_zone(mask) ((__force int)((mask) & (__force gfp_t)GFP_ZONEMASK))
+static inline int gfp_zone(gfp_t gfp)
+{
+ int zone = GFP_ZONEMASK & (__force int) gfp;
+ BUG_ON(zone >= GFP_ZONETYPES);
+ return zone;
+}
/*
* There is only one page-allocator function, and two main namespaces to