* vm_page::offset is now called cache_offset and is now an uint32 instead of off_t;

this saves 4 bytes per page. To compensate the loss of bytes, the offset is now
  stored in page size units, that's enough to address 2^44 or 16 TB (which is now
  the maximal supported file size!).
* Renamed vm_page::ppn to physical_page_number.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15637 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/ppc/arch_vm.h

@@ -10,4 +10,6 @@
 #define NUM_IO_PAGES	4
 	/* 16 kB */
 
+#define PAGE_SHIFT 12
+
 #endif	/* ARCH_PPC_VM_H */

headers/private/kernel/arch/x86/arch_vm.h

@@ -10,4 +10,6 @@
 #define NUM_IO_PAGES	4
 	/* 16 kB */
 
+#define PAGE_SHIFT 12
+
 #endif	/* ARCH_x86_VM_H */

headers/private/kernel/vm.h

@@ -9,8 +9,9 @@
 #define _KERNEL_VM_H
 
 
-#include <kernel.h>
+//#include <kernel.h>
 #include <vm_types.h>
+#include <arch/vm.h>
 #include <arch/vm_translation_map.h>
 
 struct kernel_args;

headers/private/kernel/vm_types.h

@@ -22,10 +22,11 @@ typedef struct vm_page {
 
 	struct vm_page		*hash_next;
 
-	addr_t				ppn; // physical page number
-	off_t				offset;
+	addr_t				physical_page_number;
 
 	struct vm_cache		*cache;
+	uint32				cache_offset;
+							// in page size units
 
 	struct vm_page		*cache_prev;
 	struct vm_page		*cache_next;