From a6864937e27ac9251cf1d5dca0dc363daaaf2973 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 3 Jan 2003 09:15:43 +0000 Subject: [PATCH] Lock the vm object when performing vm_object_clear_flag(). --- sys/vm/vm_map.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index 9b863de3a052..97d7c6d7725e 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -2265,7 +2265,9 @@ vm_map_copy_entry( } vm_object_reference(src_object); + vm_object_lock(src_object); vm_object_clear_flag(src_object, OBJ_ONEMAPPING); + vm_object_unlock(src_object); dst_entry->object.vm_object = src_object; src_entry->eflags |= (MAP_ENTRY_COW|MAP_ENTRY_NEEDS_COPY); dst_entry->eflags |= (MAP_ENTRY_COW|MAP_ENTRY_NEEDS_COPY); @@ -2355,7 +2357,9 @@ vmspace_fork(struct vmspace *vm1) vm_object_deallocate(object); object = old_entry->object.vm_object; } + vm_object_lock(object); vm_object_clear_flag(object, OBJ_ONEMAPPING); + vm_object_unlock(object); /* * Clone the entry, referencing the shared object.