svn commit: r198472 - head/sys/vm

[Alan Cox]

Author: alc
Date: Sun Oct 25 17:30:50 2009
New Revision: 198472
URL: http://svn.freebsd.org/changeset/base/198472

Log:
  Eliminate an unnecessary check from vm_fault_prefault().

Modified:
  head/sys/vm/vm_fault.c

Modified: head/sys/vm/vm_fault.c
==============================================================================
--- head/sys/vm/vm_fault.c	Sun Oct 25 15:52:31 2009	(r198471)
+++ head/sys/vm/vm_fault.c	Sun Oct 25 17:30:50 2009	(r198472)
@@ -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);