[src/trunk]: src/sys/rump/librump/rumpkern Accomplish messy stack with slight...

[pooka <pooka%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/de49c3333bdf
branches:  trunk
changeset: 750823:de49c3333bdf
user:      pooka <pooka%NetBSD.org@localhost>
date:      Fri Jan 15 20:39:46 2010 +0000

description:
Accomplish messy stack with slightly less messy code.

diffstat:

 sys/rump/librump/rumpkern/rump.c |  17 ++++-------------
 1 files changed, 4 insertions(+), 13 deletions(-)

diffs (47 lines):

diff -r c271e8d23b98 -r de49c3333bdf sys/rump/librump/rumpkern/rump.c
--- a/sys/rump/librump/rumpkern/rump.c  Fri Jan 15 20:09:09 2010 +0000
+++ b/sys/rump/librump/rumpkern/rump.c  Fri Jan 15 20:39:46 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: rump.c,v 1.150 2010/01/15 19:01:04 pooka Exp $ */
+/*     $NetBSD: rump.c,v 1.151 2010/01/15 20:39:46 pooka Exp $ */
 
 /*
  * Copyright (c) 2007 Antti Kantee.  All Rights Reserved.
@@ -28,7 +28,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rump.c,v 1.150 2010/01/15 19:01:04 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rump.c,v 1.151 2010/01/15 20:39:46 pooka Exp $");
 
 #include <sys/param.h>
 #include <sys/atomic.h>
@@ -145,18 +145,10 @@
 rump_proc_vfs_init_fn rump_proc_vfs_init;
 rump_proc_vfs_release_fn rump_proc_vfs_release;
 
-/*
- * Stir up the stack a bit.  These are exported functions to help
- * convince the compiler that we don't want these routines completely
- * optimized out or inlined.  Is there an easier way to do this?
- */
-void nullfn(uint32_t *);
-void nullfn(uint32_t *arg){}
-void messthestack(void);
-void
+static void __noinline
 messthestack(void)
 {
-       uint32_t mess[64];
+       volatile uint32_t mess[64];
        uint64_t d1, d2;
        int i, error;
 
@@ -164,7 +156,6 @@
                rumpuser_gettime(&d1, &d2, &error);
                mess[i] = d2;
        }
-       nullfn(mess);
 }
 
 int