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-rw-r--r--include/linux/mmzone.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 88c30f844ab..ebfc238cc24 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -98,11 +98,14 @@ struct per_cpu_pageset {
* 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 for GFP_ZONETYPES when the left most bit is not
+ * a "loner", otherwise use the second.
*
* NOTE! Make sure this matches the zones in <linux/gfp.h>
*/
#define GFP_ZONEMASK 0x07
-#define GFP_ZONETYPES 5
+/* #define GFP_ZONETYPES (GFP_ZONEMASK + 1) */ /* Non-loner */
+#define GFP_ZONETYPES ((GFP_ZONEMASK + 1) / 2 + 1) /* Loner */
/*
* On machines where it is needed (eg PCs) we divide physical memory