On Wed, Mar 04, 2020 at 01:57:39PM -0500, Tejun Heo wrote: > Hey, Greg. > > On Wed, Mar 04, 2020 at 06:29:07PM +0100, Greg KH wrote: > > How does that happen? Who has access to a kobject without also having > > the reference count incremented at the same time? Is this through sysfs > > or somewhere within the kernel itself? > > Hopefully, this part was addressed in the other reply. Yes, thanks. > > The struct device refcount should be all that is needed, don't use RCU > > just to "delay freeing this object until some later time because someone > > else might have a pointer to id". That's ripe for disaster. > > I think it's an idiomatic use of rcu given the circumstances. Whether > the circumstances are reasonable is totally debatable. They are not reasonable :)
