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Eliminate a bit of hackery from vm_fault(). The operations that this

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hackery sought to prevent are now properly supported by vm_map_protect().
(See r198505.)

Reviewed by:	kib
This commit is contained in:
Alan Cox 2009-11-03 17:15:15 +00:00
parent 1b9d701fee
commit 86684848b6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=198855
1 changed files with 0 additions and 11 deletions
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11
sys/vm/vm_fault.c
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@ -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;