Author: alc
Date: Tue Nov 3 17:15:15 2009
New Revision: 198855
URL: http://svn.freebsd.org/changeset/base/198855
Log:
Eliminate a bit of hackery from vm_fault(). The operations that this
hackery sought to prevent are now properly supported by vm_map_protect().
(See r198505.)
Reviewed by: kib
Modified:
head/sys/vm/vm_fault.c
Modified: head/sys/vm/vm_fault.c
==============================================================================
--- head/sys/vm/vm_fault.c Tue Nov 3 16:46:52 2009 (r198854)
+++ head/sys/vm/vm_fault.c Tue Nov 3 17:15:15 2009 (r198855)
@@ -264,17 +264,6 @@ RetryFault:;
&fs.entry, &fs.first_object, &fs.first_pindex, &prot,
&wired);
if (result != KERN_SUCCESS)
return (result);
-
- /*
- * If we don't COW now, on a user wire, the user will never
- * be able to write to the mapping. If we don't make this
- * restriction, the bookkeeping would be nearly impossible.
- *
- * XXX The following assignment modifies the map without
- * holding a write lock on it.
- */
- if ((fs.entry->protection & VM_PROT_WRITE) == 0)
- fs.entry->max_protection &= ~VM_PROT_WRITE;
}
map_generation = fs.map->timestamp;
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