--- zzzz-none-000/linux-2.6.19.2/include/linux/mmzone.h	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/include/linux/mmzone.h	2008-06-19 07:46:28.000000000 +0000
@@ -218,9 +218,13 @@
 	 * under - it drives the swappiness decision: whether to unmap mapped
 	 * pages.
 	 *
-	 * Access to both this field is quite racy even on uniprocessor.  But
+	 * temp_priority is used to remember the scanning priority at which
+	 * this zone was successfully refilled to free_pages == pages_high.
+	 *
+	 * Access to both these fields is quite racy even on uniprocessor.  But
 	 * it is expected to average out OK.
 	 */
+	int temp_priority;
 	int prev_priority;
 
 
@@ -643,6 +647,15 @@
 
 static inline int pfn_valid(unsigned long pfn)
 {
+#if defined(CONFIG_MIPS)
+#if defined(CONFIG_MIPS_UR8)
+    unsigned int ram_start = CONFIG_MIPS_UR8_PHY_MEMSTART;
+#endif /*--- #if defined(CONFIG_MIPS_UR8) ---*/
+    /*--- Speicher Spar Hack Anfang ---*/
+    if(pfn < (ram_start >> PAGE_SHIFT))
+        return 0;
+    /*--- Speicher Spar Hack Ende ---*/
+#endif /*--- #if defined(CONFIG_MIPS) ---*/
 	if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)
 		return 0;
 	return valid_section(__nr_to_section(pfn_to_section_nr(pfn)));
@@ -676,6 +689,22 @@
 #define early_pfn_in_nid(pfn, nid)	(1)
 #endif
 
+#if defined(CONFIG_MIPS)
+/*--- Speicher Spar Hack Anfang ---*/
+static inline int _early_pfn_valid(unsigned long pfn) {
+#if defined(CONFIG_MIPS_UR8)
+    unsigned int ram_start = CONFIG_MIPS_UR8_PHY_MEMSTART;
+#endif /*--- #if defined(CONFIG_MIPS_UR8) ---*/
+    /*--- Speicher Spar Hack ---*/
+    if(pfn < (ram_start >> PAGE_SHIFT))
+        return 0;
+    return 1;
+}
+
+#define early_pfn_valid(pfn)    _early_pfn_valid(pfn)
+/*--- Speicher Spar Hack Ende ---*/
+#endif /*--- #if defined(CONFIG_MIPS) ---*/
+
 #ifndef early_pfn_valid
 #define early_pfn_valid(pfn)	(1)
 #endif