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remove a useless call to uvm_map_protect(). the kernel text is already 

mapped read-only in pmap_bootstrap() and the comment which tried to
explain why this might be needed anyway didn't make any sense.
This commit is contained in:
chs 2001-05-28 21:54:26 +00:00
parent 1cedb649d4
commit e49a700498
2 changed files with 2 additions and 20 deletions
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11
sys/arch/sun3/sun3/machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.145 2001/04/24 04:31:13 thorpej Exp $ */ /* $NetBSD: machdep.c,v 1.146 2001/05/28 21:54:26 chs Exp $ */
/* /*
* Copyright (c) 1994, 1995 Gordon W. Ross * Copyright (c) 1994, 1995 Gordon W. Ross
@ -291,15 +291,6 @@ cpu_startup()
format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
printf("using %d buffers containing %s of memory\n", nbuf, pbuf); printf("using %d buffers containing %s of memory\n", nbuf, pbuf);
/*
* Tell the VM system that writing to kernel text isn't allowed.
* If we don't, we might end up COW'ing the text segment!
*/
if (uvm_map_protect(kernel_map, (vm_offset_t) kernel_text,
m68k_trunc_page((vm_offset_t) etext),
UVM_PROT_READ|UVM_PROT_EXEC, TRUE) != 0)
panic("can't protect kernel text");
/* /*
* Allocate a virtual page (for use by /dev/mem) * Allocate a virtual page (for use by /dev/mem)
* This page is handed to pmap_enter() therefore * This page is handed to pmap_enter() therefore

11
sys/arch/sun3/sun3x/machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.66 2001/05/28 20:56:54 chs Exp $ */ /* $NetBSD: machdep.c,v 1.67 2001/05/28 21:54:27 chs Exp $ */
/* /*
* Copyright (c) 1988 University of Utah. * Copyright (c) 1988 University of Utah.
@ -293,15 +293,6 @@ cpu_startup()
format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG);
printf("using %d buffers containing %s of memory\n", nbuf, pbuf); printf("using %d buffers containing %s of memory\n", nbuf, pbuf);
/*
* Tell the VM system that writing to kernel text isn't allowed.
* If we don't, we might end up COW'ing the text segment!
*/
if (uvm_map_protect(kernel_map, (vm_offset_t) kernel_text,
m68k_trunc_page((vm_offset_t) etext),
UVM_PROT_READ|UVM_PROT_EXEC, TRUE) != 0)
panic("can't protect kernel text");
/* /*
* Allocate a virtual page (for use by /dev/mem) * Allocate a virtual page (for use by /dev/mem)
* This page is handed to pmap_enter() therefore * This page is handed to pmap_enter() therefore