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Slightly better test for "object with no real pages". Test for NULL 

pgo_releasepg rather than if the pager is the device pager.
This commit is contained in:
thorpej 1999-07-10 20:29:24 +00:00
parent 6e1a032789
commit d75fb0f6b0
1 changed files with 5 additions and 5 deletions
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10
sys/uvm/uvm_mmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_mmap.c,v 1.30 1999/07/08 00:52:45 thorpej Exp $ */
/* $NetBSD: uvm_mmap.c,v 1.31 1999/07/10 20:29:24 thorpej Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -197,16 +197,16 @@ sys_mincore(p, v, retval)
lim = end < entry->end ? end : entry->end;
/*
* Special case for mapped devices; these are always
* considered resident.
* Special case for objects with no "real" pages. Those
* are always considered resident (mapped devices).
*/
if (UVM_ET_ISOBJ(entry)) {
extern struct uvm_pagerops uvm_deviceops; /* XXX */
#ifdef DIAGNOSTIC
if (UVM_OBJ_IS_KERN_OBJECT(entry->object.uvm_obj))
panic("mincore: user map has kernel object");
#endif
if (entry->object.uvm_obj->pgops == &uvm_deviceops) {
if (entry->object.uvm_obj->pgops->pgo_releasepg
== NULL) {
for (/* nothing */; start < lim;
start += PAGE_SIZE, vec++)
subyte(vec, 1);