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From: Alan Cox <alc@FreeBSD.org>
Date: Sat, 31 Oct 2009 18:18:32 +0000 (UTC)
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Cc: 
Subject: svn commit: r198726 - in stable/8/sys: . amd64/include/xen
	cddl/contrib/opensolaris contrib/dev/acpica contrib/pf
	dev/xen/xenpci vm
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Author: alc
Date: Sat Oct 31 18:18:32 2009
New Revision: 198726
URL: http://svn.freebsd.org/changeset/base/198726

Log:
  MFC r198472
    Eliminate an unnecessary check from vm_fault_prefault().

Modified:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)
  stable/8/sys/vm/vm_fault.c

Modified: stable/8/sys/vm/vm_fault.c
==============================================================================
--- stable/8/sys/vm/vm_fault.c	Sat Oct 31 18:04:34 2009	(r198725)
+++ stable/8/sys/vm/vm_fault.c	Sat Oct 31 18:18:32 2009	(r198726)
@@ -1011,8 +1011,8 @@ vm_fault_prefault(pmap_t pmap, vm_offset
 		while ((m = vm_page_lookup(lobject, pindex)) == NULL &&
 		    lobject->type == OBJT_DEFAULT &&
 		    (backing_object = lobject->backing_object) != NULL) {
-			if (lobject->backing_object_offset & PAGE_MASK)
-				break;
+			KASSERT((lobject->backing_object_offset & PAGE_MASK) ==
+			    0, ("vm_fault_prefault: unaligned object offset"));
 			pindex += lobject->backing_object_offset >> PAGE_SHIFT;
 			VM_OBJECT_LOCK(backing_object);
 			VM_OBJECT_UNLOCK(lobject);