--- linux-2.4.2/include/linux/pagemap.h	Thu Feb 22 01:10:01 2001
+++ linux/include/linux/pagemap.h	Sun Mar  4 20:14:50 2001
@@ -58,7 +58,8 @@
  */
 extern inline unsigned long _page_hashfn(struct address_space * mapping, unsigned long index)
 {
-#define i (((unsigned long) mapping)/(sizeof(struct inode) & ~ (sizeof(struct inode) - 1)))
+#define i (((unsigned long) mapping) / \
+	(sizeof(struct address_space) & ~ (sizeof(struct address_space) - 1)))
 #define s(x) ((x)+((x)>>PAGE_HASH_BITS))
 	return s(i+index) & (PAGE_HASH_SIZE-1);
 #undef i