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SPUs are registered as system devices, exposing attributes through sysfs. Since the sysdev includes a kref, we can remove the one in struct spu (it isn't used at the moment anyway). Currently only the interrupt source and numa node attributes are added. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>