Date: Thu, 15 Nov 2001 09:26:56 +0800 From: "David Xu" <davidx@viasoft.com.cn> To: <freebsd-hackers@FreeBSD.ORG> Subject: vm_map_protect() Message-ID: <005a01c16d74$9e0c88a0$ef01a8c0@davidwnt>
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In FreeBSD 4.4-stable file /sys/vm/vm_map.c, function vm_map_protect()
will leave and have an entry splitted when first pass fails.
here is the patch to avoid such issue.
%diff -u vm_map.c.orig vm_map.c
--- vm_map.c.orig Thu Nov 15 08:27:19 2001
+++ vm_map.c Thu Nov 15 09:08:47 2001
@@ -999,13 +999,14 @@
{
vm_map_entry_t current;
vm_map_entry_t entry;
+ int clip_start =3D 0;
vm_map_lock(map);
VM_MAP_RANGE_CHECK(map, start, end);
if (vm_map_lookup_entry(map, start, &entry)) {
- vm_map_clip_start(map, entry, start);
+ clip_start =3D 1;
} else {
entry =3D entry->next;
}
@@ -1026,6 +1027,8 @@
}
current =3D current->next;
}
+ if (clip_start)
+ vm_map_clip_start(map, entry, start);
/*
* Go back and fix up protections. [Note that clipping is not
--
David Xu
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