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Simple read-modify-write operations on a vm object's flags, ref_count, and

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shadow_count can now rely on its mutex for synchronization.  Remove one use
of Giant from vm_map_insert().
This commit is contained in:
Alan Cox 2003-06-27 18:52:49 +00:00
parent fcccbacd7e
commit 23252eeabe
1 changed files with 0 additions and 4 deletions
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4
sys/vm/vm_map.c
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@ -821,14 +821,10 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_ooffset_t offset,
* reference counting is insufficient to recognize
* aliases with precision.)
*/
if (object != kmem_object)
mtx_lock(&Giant);
VM_OBJECT_LOCK(object);
if (object->ref_count > 1 || object->shadow_count != 0)
vm_object_clear_flag(object, OBJ_ONEMAPPING);
VM_OBJECT_UNLOCK(object);
if (object != kmem_object)
mtx_unlock(&Giant);
}
else if ((prev_entry != &map->header) &&
(prev_entry->eflags == protoeflags) &&