is only called with an
extra reference held (for each/find device.)

But ... doesn't that then still have unbalanced calls to __devcd_del()
and thus device_del()/put_device()?

CPU 0				CPU 1

dev_coredump_put()		devcd_del()
 -> devcd_free()
   -> locked
     -> !deleted
     -> __devcd_del()
				-> __devcd_del()

no?

johannes[PATCH] devcoredump: Fix circular locking dependency with devcd->mutex.Johannes Berg <johannes@sipsolutions.net> undefinedMaarten Lankhorst <dev@lankhorst.se>, linux-kernel@vger.kernel.org undefined undefined undefined undefined undefined undefined undefined undefined undefined���f