[src/trunk]: src/sys Add a __HAVE_CPU_UAREA_IDLELWP hook so that the MD code ...

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

details:   https://anonhg.NetBSD.org/src/rev/497f6cbe649b
branches:  trunk
changeset: 781325:497f6cbe649b
user:      matt <matt%NetBSD.org@localhost>
date:      Sat Sep 01 00:26:37 2012 +0000

description:
Add a __HAVE_CPU_UAREA_IDLELWP hook so that the MD code can allocate
special UAREAs for idle lwp's.

diffstat:

 sys/kern/kern_kthread.c |   7 ++++---
 sys/uvm/uvm_extern.h    |   4 ++--
 sys/uvm/uvm_glue.c      |  10 +++++++---
 3 files changed, 13 insertions(+), 8 deletions(-)

diffs (78 lines):

diff -r b740240a6a4a -r 497f6cbe649b sys/kern/kern_kthread.c
--- a/sys/kern/kern_kthread.c   Sat Sep 01 00:24:43 2012 +0000
+++ b/sys/kern/kern_kthread.c   Sat Sep 01 00:26:37 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: kern_kthread.c,v 1.38 2011/11/01 15:39:37 jym Exp $    */
+/*     $NetBSD: kern_kthread.c,v 1.39 2012/09/01 00:26:37 matt Exp $   */
 
 /*-
  * Copyright (c) 1998, 1999, 2007, 2009 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_kthread.c,v 1.38 2011/11/01 15:39:37 jym Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_kthread.c,v 1.39 2012/09/01 00:26:37 matt Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -70,7 +70,8 @@
 
        KASSERT((flag & KTHREAD_INTR) == 0 || (flag & KTHREAD_MPSAFE) != 0);
 
-       uaddr = uvm_uarea_system_alloc();
+       uaddr = uvm_uarea_system_alloc(
+          (flag & (KTHREAD_INTR|KTHREAD_IDLE)) == KTHREAD_IDLE ? ci : NULL);
        if (uaddr == 0) {
                return ENOMEM;
        }
diff -r b740240a6a4a -r 497f6cbe649b sys/uvm/uvm_extern.h
--- a/sys/uvm/uvm_extern.h      Sat Sep 01 00:24:43 2012 +0000
+++ b/sys/uvm/uvm_extern.h      Sat Sep 01 00:26:37 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_extern.h,v 1.183 2012/04/08 11:27:45 martin Exp $  */
+/*     $NetBSD: uvm_extern.h,v 1.184 2012/09/01 00:26:37 matt Exp $    */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -601,7 +601,7 @@
 __dead void            uvm_scheduler(void);
 vaddr_t                        uvm_uarea_alloc(void);
 void                   uvm_uarea_free(vaddr_t);
-vaddr_t                        uvm_uarea_system_alloc(void);
+vaddr_t                        uvm_uarea_system_alloc(struct cpu_info *);
 void                   uvm_uarea_system_free(vaddr_t);
 vaddr_t                        uvm_lwp_getuarea(lwp_t *);
 void                   uvm_lwp_setuarea(lwp_t *, vaddr_t);
diff -r b740240a6a4a -r 497f6cbe649b sys/uvm/uvm_glue.c
--- a/sys/uvm/uvm_glue.c        Sat Sep 01 00:24:43 2012 +0000
+++ b/sys/uvm/uvm_glue.c        Sat Sep 01 00:26:37 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_glue.c,v 1.159 2012/04/08 11:27:45 martin Exp $    */
+/*     $NetBSD: uvm_glue.c,v 1.160 2012/09/01 00:26:37 matt Exp $      */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_glue.c,v 1.159 2012/04/08 11:27:45 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_glue.c,v 1.160 2012/09/01 00:26:37 matt Exp $");
 
 #include "opt_kgdb.h"
 #include "opt_kstack.h"
@@ -366,8 +366,12 @@
 }
 
 vaddr_t
-uvm_uarea_system_alloc(void)
+uvm_uarea_system_alloc(struct cpu_info *ci)
 {
+#ifdef __HAVE_CPU_UAREA_ALLOC_IDLELWP
+       if (__predict_false(ci != NULL))
+               return cpu_uarea_alloc_idlelwp(ci);
+#endif
 
        return (vaddr_t)pool_cache_get(uvm_uarea_system_cache, PR_WAITOK);
 }