svn commit: r196894 - stable/7/sys/vm
Konstantin Belousov
kib at FreeBSD.org
Sun Sep 6 15:23:03 UTC 2009
Author: kib
Date: Sun Sep 6 15:23:03 2009
New Revision: 196894
URL: http://svn.freebsd.org/changeset/base/196894
Log:
Partial MFC of r194459 by thompsa, without merge recording,
to allow the vm_phys_paddr_to_vm_page(9) to return NULL instead
of panicking when supplied physical address does not correspond
to a vm page. This is needed for device pager (and not yet merged
sg pager) to skip memattr checks on specific addresses.
Reported by: Thierry Herbelot <thierry.herbelot free fr>
Modified:
stable/7/sys/vm/vm_phys.c
Modified: stable/7/sys/vm/vm_phys.c
==============================================================================
--- stable/7/sys/vm/vm_phys.c Sun Sep 6 14:23:26 2009 (r196893)
+++ stable/7/sys/vm/vm_phys.c Sun Sep 6 15:23:03 2009 (r196894)
@@ -382,8 +382,7 @@ vm_phys_paddr_to_vm_page(vm_paddr_t pa)
if (pa >= seg->start && pa < seg->end)
return (&seg->first_page[atop(pa - seg->start)]);
}
- panic("vm_phys_paddr_to_vm_page: paddr %#jx is not in any segment",
- (uintmax_t)pa);
+ return (NULL);
}
/*
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