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In pmap_allocpagedir(), check if uvm_km_zalloc of ptpt is successful, 

and handle alloc failure case.
This commit is contained in:
toshii 2001-04-20 18:11:53 +00:00
parent 1a5fe5b583
commit 61ff48a82e
1 changed files with 9 additions and 2 deletions
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11
sys/arch/arm/arm32/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.4 2001/03/15 06:10:35 chs Exp $ */
/* $NetBSD: pmap.c,v 1.5 2001/04/20 18:11:53 toshii Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -178,6 +178,7 @@ void map_pagetable __P((vaddr_t pagetable, vaddr_t va,
paddr_t pa, unsigned int flags));
void pmap_copy_on_write __P((paddr_t pa));
void pmap_pinit __P((pmap_t));
void pmap_freepagedir __P((pmap_t));
void pmap_release __P((pmap_t));
/* Other function prototypes */
@ -1085,6 +1086,11 @@ pmap_allocpagedir(pmap)
}
#endif /* DIAGNOSTIC */
pmap->pm_vptpt = uvm_km_zalloc(kernel_map, NBPG);
if (pmap->pm_vptpt == 0) {
pmap_freepagedir(pmap);
return(ENOMEM);
}
(void) pmap_extract(kernel_pmap, pmap->pm_vptpt, &pmap->pm_pptpt);
pmap->pm_pptpt &= PG_FRAME;
/* Revoke cacheability and bufferability */
@ -1160,7 +1166,8 @@ pmap_freepagedir(pmap)
pmap_t pmap;
{
/* Free the memory used for the page table mapping */
uvm_km_free(kernel_map, (vaddr_t)pmap->pm_vptpt, NBPG);
if (pmap->pm_vptpt != 0)
uvm_km_free(kernel_map, (vaddr_t)pmap->pm_vptpt, NBPG);
/* junk the L1 page table */
if (pmap->pm_l1pt->pt_flags & PTFLAG_STATIC) {