This series makes the ref_count field of device and bus objects actually match the number of references that the objects have. Once this is done, the question "how do I delete an object?" has a simple answer: use object_unparent if the object is reachable from the QOM tree, else use object_unref. qdev_free and qbus_free become equivalent to simply object_unparent. object_delete instead is replaced by object_unref.
Patches 1-3 fix some warts in the last minute patches that went in 1.3. Patches 4-9 are the bulk of the series. Patches 11-12 touches the CPU classes instead. There is a new patch (#4) that documents how link properties are reference counted, and the transfer of ownership when the property is created/deleted. I renamed qbus_remove_children to bus_unparent, and rebased for the conversion of ->state to ->realized. PPC was also using object_delete for its CPU, too. Otherwise, there are no changes. Paolo Paolo Bonzini (12): qdev: export and use qbus_init qdev: use object_new, not g_malloc to create buses qom: preserve object while unparenting it qom: document reference counting of link properties qdev: add reference count to a device for the BusChild qdev: move deletion of children from finalize to unparent qdev: move unrealization of devices from finalize to unparent qdev: add reference for the bus while it is referred to by the DeviceState qdev: inline object_delete into qbus_free/qdev_free qdev: drop extra references at creation time cpu: do not use object_delete qom: remove object_delete hw/pci/pci.c | 11 +++-- hw/pci/pci.h | 5 --- hw/qdev-core.h | 1 + hw/qdev-monitor.c | 5 ++- hw/qdev.c | 105 +++++++++++++++++++++++++------------------- hw/sysbus.c | 6 +-- include/qom/object.h | 22 +++------- linux-user/syscall.c | 2 +- qom/object.c | 9 +--- target-i386/helper.c | 4 +- target-ppc/translate_init.c | 2 +- target-sparc/cpu.c | 2 +- vl.c | 1 + 13 files changed, 88 insertions(+), 87 deletions(-) -- 1.8.1
