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Give the kmem object's mutex a unique name, instead of "vm object",

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to avoid false reports of lock-order reversal with a system map mutex.

Approved by:	re (jhb)
This commit is contained in:
Alan Cox 2003-05-09 02:13:23 +00:00
parent 3b70c1d701
commit 3a12f5da1f
1 changed files with 6 additions and 1 deletions
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7
sys/vm/vm_object.c
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@ -238,8 +238,13 @@ vm_object_init(void)
_vm_object_allocate(OBJT_DEFAULT, OFF_TO_IDX(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS),
kernel_object);
/*
* The kmem object's mutex is given a unique name, instead of
* "vm object", to avoid false reports of lock-order reversal
* with a system map mutex.
*/
kmem_object = &kmem_object_store;
VM_OBJECT_LOCK_INIT(&kmem_object_store);
mtx_init(VM_OBJECT_MTX(kmem_object), "kmem object", NULL, MTX_DEF);
_vm_object_allocate(OBJT_DEFAULT, OFF_TO_IDX(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS),
kmem_object);