d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Don't bother calling pmap_emulate_reference() from cpu_fork(). It isn't

Browse Source 
needed and it panics a DIAGNOSTIC kernel.
This commit is contained in:
Doug Rabson 1998-07-12 16:30:58 +00:00
parent bb8a6f725b
commit 8e8c234f4d
3 changed files with 3 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sys/alpha/alpha/vm_machdep.c
View File

@ -38,7 +38,7 @@
* *
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.1 1998/06/10 10:53:40 dfr Exp $ * $Id: vm_machdep.c,v 1.2 1998/06/10 19:59:41 dfr Exp $
*/ */
/* /*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -128,16 +128,6 @@ cpu_fork(p1, p2)
*/ */
p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb); p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb);
/*
* Simulate a write to the process's U-area pages,
* so that the system doesn't lose badly.
* (If this isn't done, the kernel can't read or
* write the kernel stack. "Ouch!")
*/
for (i = 0; i < UPAGES; i++)
pmap_emulate_reference(p2, (vm_offset_t)up + i * PAGE_SIZE,
0, 1);
/* /*
* Copy floating point state from the FP chip to the PCB * Copy floating point state from the FP chip to the PCB
* if this process has state stored there. * if this process has state stored there.

12
sys/powerpc/aim/vm_machdep.c
View File

@ -38,7 +38,7 @@
* *
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.1 1998/06/10 10:53:40 dfr Exp $ * $Id: vm_machdep.c,v 1.2 1998/06/10 19:59:41 dfr Exp $
*/ */
/* /*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -128,16 +128,6 @@ cpu_fork(p1, p2)
*/ */
p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb); p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb);
/*
* Simulate a write to the process's U-area pages,
* so that the system doesn't lose badly.
* (If this isn't done, the kernel can't read or
* write the kernel stack. "Ouch!")
*/
for (i = 0; i < UPAGES; i++)
pmap_emulate_reference(p2, (vm_offset_t)up + i * PAGE_SIZE,
0, 1);
/* /*
* Copy floating point state from the FP chip to the PCB * Copy floating point state from the FP chip to the PCB
* if this process has state stored there. * if this process has state stored there.

12
sys/powerpc/powerpc/vm_machdep.c
View File

@ -38,7 +38,7 @@
* *
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.1 1998/06/10 10:53:40 dfr Exp $ * $Id: vm_machdep.c,v 1.2 1998/06/10 19:59:41 dfr Exp $
*/ */
/* /*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -128,16 +128,6 @@ cpu_fork(p1, p2)
*/ */
p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb); p2->p_md.md_pcbpaddr = (void*) vtophys((vm_offset_t) &up->u_pcb);
/*
* Simulate a write to the process's U-area pages,
* so that the system doesn't lose badly.
* (If this isn't done, the kernel can't read or
* write the kernel stack. "Ouch!")
*/
for (i = 0; i < UPAGES; i++)
pmap_emulate_reference(p2, (vm_offset_t)up + i * PAGE_SIZE,
0, 1);
/* /*
* Copy floating point state from the FP chip to the PCB * Copy floating point state from the FP chip to the PCB
* if this process has state stored there. * if this process has state stored there.