X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fpageblock-flags.h;h=e8c06122be36058f88cb6e291360eb2c0ebe09a0;hb=50d11d190afa4e21284b735bb0a092036f298f0b;hp=5456da6b4ade76b7b8887b2bb009e2fe9c770177;hpb=64c5e135bf5a2a7f0ededb3435a31adbe0202f0c;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index 5456da6..e8c0612 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -1,6 +1,6 @@
 /*
  * Macros for manipulating and testing flags related to a
- * MAX_ORDER_NR_PAGES block of pages.
+ * pageblock_nr_pages number of pages.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -25,16 +25,37 @@
 
 #include <linux/types.h>
 
-/* Macro to aid the definition of ranges of bits */
-#define PB_range(name, required_bits) \
-	name, name ## _end = (name + required_bits) - 1
-
 /* Bit indices that affect a whole block of pages */
 enum pageblock_bits {
-	PB_range(PB_migrate, 2), /* 2 bits required for migrate types */
+	PB_migrate,
+	PB_migrate_end = PB_migrate + 3 - 1,
+			/* 3 bits required for migrate types */
 	NR_PAGEBLOCK_BITS
 };
 
+#ifdef CONFIG_HUGETLB_PAGE
+
+#ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
+
+/* Huge page sizes are variable */
+extern int pageblock_order;
+
+#else /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
+/* Huge pages are a constant size */
+#define pageblock_order		HUGETLB_PAGE_ORDER
+
+#endif /* CONFIG_HUGETLB_PAGE_SIZE_VARIABLE */
+
+#else /* CONFIG_HUGETLB_PAGE */
+
+/* If huge pages are not used, group by MAX_ORDER_NR_PAGES */
+#define pageblock_order		(MAX_ORDER-1)
+
+#endif /* CONFIG_HUGETLB_PAGE */
+
+#define pageblock_nr_pages	(1UL << pageblock_order)
+
 /* Forward declaration */
 struct page;