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Fix another off-by-one, this time in the current KVA limited as maintained 

by pmap_growkernel.
This commit is contained in:
fvdl 2003-02-25 00:48:00 +00:00
parent 0691446706
commit e3a92065e8
1 changed files with 8 additions and 6 deletions
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14
sys/arch/x86_64/x86_64/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.14 2003/02/23 02:44:44 fvdl Exp $ */
/* $NetBSD: pmap.c,v 1.15 2003/02/25 00:48:00 fvdl Exp $ */
/*
*
@ -3334,6 +3334,8 @@ pmap_alloc_level(pdes, kva, lvl, needed_ptps)
* the pmaps on the system.
*/
static vaddr_t pmap_maxkvaddr = VM_MIN_KERNEL_ADDRESS;
vaddr_t
pmap_growkernel(maxkvaddr)
vaddr_t maxkvaddr;
@ -3341,12 +3343,11 @@ pmap_growkernel(maxkvaddr)
struct pmap *kpm = pmap_kernel(), *pm;
int s, i;
unsigned newpdes;
vaddr_t curmax;
long needed_kptp[PTP_LEVELS], target_nptp, old;
curmax = VM_MIN_KERNEL_ADDRESS + nkptp[1] * NBPD_L2;
if (maxkvaddr <= curmax)
return curmax;
if (maxkvaddr <= pmap_maxkvaddr)
return pmap_maxkvaddr;
maxkvaddr = round_pdr(maxkvaddr);
old = nkptp[PTP_LEVELS - 1];
/*
@ -3367,7 +3368,7 @@ pmap_growkernel(maxkvaddr)
s = splhigh(); /* to be safe */
simple_lock(&kpm->pm_lock);
pmap_alloc_level(normal_pdes, curmax, PTP_LEVELS,
pmap_alloc_level(normal_pdes, pmap_maxkvaddr, PTP_LEVELS,
needed_kptp);
/*
@ -3389,6 +3390,7 @@ pmap_growkernel(maxkvaddr)
simple_unlock(&pmaps_lock);
}
pmap_maxkvaddr = maxkvaddr;
simple_unlock(&kpm->pm_lock);
splx(s);