diff --git a/mm/page_alloc.h b/mm/page_alloc.h
index 9c3c2830acb0..7097ea1805f6 100644
--- a/mm/page_alloc.h
+++ b/mm/page_alloc.h
@@ -32,12 +32,11 @@
 #define ALLOC_OOM		ALLOC_NO_WATERMARKS
 #endif
 
-#define ALLOC_NON_BLOCK		 0x10 /* Caller cannot block. Allow access
-				       * to 25% of the min watermark or
-				       * 62.5% if __GFP_HIGH is set.
-				       */
+#define ALLOC_NON_BLOCK		 0x10 /* Caller cannot block. */
 #define ALLOC_MIN_RESERVE	 0x20 /* __GFP_HIGH set. Allow access to 50%
-				       * of the min watermark.
+				       * of the min watermark, or 62.5% if
+				       * the caller cannot block either
+				       * (ALLOC_NON_BLOCK).
 				       */
 #define ALLOC_CPUSET		 0x40 /* check for correct cpuset */
 #define ALLOC_CMA		 0x80 /* allow allocations from CMA areas */
@@ -58,7 +57,7 @@
 #define ALLOC_NO_CODETAG       0x1000
 
 /* Flags that allow allocations below the min watermark. */
-#define ALLOC_RESERVES (ALLOC_NON_BLOCK|ALLOC_MIN_RESERVE|ALLOC_HIGHATOMIC|ALLOC_OOM)
+#define ALLOC_RESERVES (ALLOC_MIN_RESERVE|ALLOC_HIGHATOMIC|ALLOC_OOM)
 
 /* Flags that mean GFP_ATOMIC */
 #define ALLOC_MASK_ATOMIC (ALLOC_NON_BLOCK|ALLOC_MIN_RESERVE)