PERFORCE change 131726 for review

[Marcel Moolenaar]

http://perforce.freebsd.org/chv.cgi?CH=131726

Change 131726 by marcel at marcel_cluster on 2007/12/26 21:32:20

	Move the vm_pmap field to the end of struct vmspace. This
	allows for a single version of userspace (and in particular
	libkvm) even though different variants of the CPU within
	a platform/architecture require variations in struct pmap.
	The MI fields of struct vmspace do not end up at different
	offsets when struct pmap varies in size.

Affected files ...

.. //depot/projects/e500/sys/vm/vm_map.h#4 edit

Differences ...

==== //depot/projects/e500/sys/vm/vm_map.h#4 (text+ko) ====

@@ -233,7 +233,6 @@
  */
 struct vmspace {
 	struct vm_map vm_map;	/* VM address map */
-	struct pmap vm_pmap;	/* private physical map */
 	struct shmmap_state *vm_shm;	/* SYS5 shared memory private data XXX */
 	segsz_t vm_swrss;	/* resident set size before last swap */
 	segsz_t vm_tsize;	/* text size (pages) XXX */
@@ -243,6 +242,12 @@
 	caddr_t vm_daddr;	/* (c) user virtual address of data */
 	caddr_t vm_maxsaddr;	/* user VA at max stack growth */
 	int	vm_refcnt;	/* number of references */
+	/*
+	 * Keep the PMAP last, so that per-CPU variations within a
+	 * single architecture can be handled by the same toolchain
+	 * without having to worry about the MI fields.
+	 */
+	struct pmap vm_pmap;	/* private physical map */
 };
 
 #ifdef	_KERNEL