Mostly remove the VM_STACK OPTION.

This changes the definitions of a few items so that structures are the
same whether or not the option itself is enabled. This allows
people to enable and disable the option without recompilng the world.

As the author says:

|I ran into a problem pulling out the VM_STACK option.  I was aware of this
|when I first did the work, but then forgot about it.  The VM_STACK stuff
|has some code changes in the i386 branch.  There need to be corresponding
|changes in the alpha branch before it can come out completely.

what is done:
|
|1) Pull the VM_STACK option out of the header files it appears in.  This
|really shouldn't affect anything that executes with or without the rest
|of the VM_STACK patches.  The vm_map_entry will then always have one
|extra element (avail_ssize).  It just won't be used if the VM_STACK
|option is not turned on.
|
|I've also pulled the option out of vm_map.c.  This shouldn't harm anything,
|since the routines that are enabled as a result are not called unless
|the VM_STACK option is enabled elsewhere.
|
|2) Add what appears to be appropriate code the the alpha branch, still
|protected behind the VM_STACK switch.  I don't have an alpha machine,
|so we would need to get some testers with alpha machines to try it out.
|
|Once there is some testing, we can consider making the change permanent
|for both i386 and alpha.
|
[..]
|
|Once the alpha code is adequately tested, we can pull VM_STACK out
|everywhere.
|

Submitted by:	"Richard Seaman, Jr." <dick@tar.com>

1 files changed, 1 insertions, 7 deletions

diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c
index 6a287b8..b1c4d82 100644
--- a/sys/vm/vm_map.c
+++ b/sys/vm/vm_map.c
@@ -61,7 +61,7 @@
  * any improvements or extensions that they make and grant Carnegie the
  * rights to redistribute these changes.
  *
- * $Id: vm_map.c,v 1.141 1999/01/21 09:40:48 dillon Exp $
+ * $Id: vm_map.c,v 1.142 1999/01/24 06:04:52 dillon Exp $
  */
 
 /*
@@ -75,9 +75,7 @@
 #include <sys/vmmeter.h>
 #include <sys/mman.h>
 #include <sys/vnode.h>
-#ifdef VM_STACK
 #include <sys/resourcevar.h>
-#endif
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
@@ -548,9 +546,7 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
 	new_entry->eflags = protoeflags;
 	new_entry->object.vm_object = object;
 	new_entry->offset = offset;
-#ifdef VM_STACK
 	new_entry->avail_ssize = 0;
-#endif
 
 	if (object) {
 		if ((object->ref_count > 1) || (object->shadow_count != 0)) {
@@ -589,7 +585,6 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
 	return (KERN_SUCCESS);
 }
 
-#ifdef VM_STACK
 int
 vm_map_stack (vm_map_t map, vm_offset_t addrbos, vm_size_t max_ssize,
 	      vm_prot_t prot, vm_prot_t max, int cow)
@@ -785,7 +780,6 @@ vm_map_growstack (struct proc *p, vm_offset_t addr)
 	return (rv);
 
 }
-#endif
 
 /*
  * Find sufficient space for `length' bytes in the given map, starting at