---

yaml
---
r: 14638
b: refs/heads/master
c: ac3461a
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4b4a27dff4e2d4cc2eac1cde31aede834a966a48
+refs/heads/master: ac3461ad632e86e7debd871776683c05ef3ba4c6

trunk/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

trunk/include/linux/mmzone.h

@@ -91,21 +91,11 @@ struct per_cpu_pageset {
  * will be a maximum of 4 (2 ** 2) zonelists, for 3 modifiers there will
  * be 8 (2 ** 3) zonelists.  GFP_ZONETYPES defines the number of possible
  * combinations of zone modifiers in "zone modifier space".
+ *
+ * NOTE! Make sure this matches the zones in <linux/gfp.h>
  */
-#define GFP_ZONEMASK	0x03
-/*
- * As an optimisation any zone modifier bits which are only valid when
- * no other zone modifier bits are set (loners) should be placed in
- * the highest order bits of this field.  This allows us to reduce the
- * extent of the zonelists thus saving space.  For example in the case
- * of three zone modifier bits, we could require up to eight zonelists.
- * If the left most zone modifier is a "loner" then the highest valid
- * zonelist would be four allowing us to allocate only five zonelists.
- * Use the first form when the left most bit is not a "loner", otherwise
- * use the second.
- */
-/* #define GFP_ZONETYPES	(GFP_ZONEMASK + 1) */		/* Non-loner */
-#define GFP_ZONETYPES	((GFP_ZONEMASK + 1) / 2 + 1)		/* Loner */
+#define GFP_ZONEMASK	0x07
+#define GFP_ZONETYPES	5
 
 /*
  * On machines where it is needed (eg PCs) we divide physical memory